diff --git a/19-plugins/config.ini b/19-plugins/config.ini
new file mode 100644
index 0000000..fa60412
--- /dev/null
+++ b/19-plugins/config.ini
@@ -0,0 +1,5 @@
+[Plugins]
+;; Valid options: plugins/words1.pyc, plugins/words2.pyc
+words = plugins/words1.pyc
+;; Valid options: plugins/frequencies1.pyc, plugins/frequencies2.pyc
+frequencies = plugins/frequencies1.pyc
diff --git a/19-plugins/plugins-src/compile.sh b/19-plugins/plugins-src/compile.sh
new file mode 100644
index 0000000..37dac1a
--- /dev/null
+++ b/19-plugins/plugins-src/compile.sh
@@ -0,0 +1,2 @@
+python -m compileall .
+cp *.pyc ../plugins
diff --git a/19-plugins/plugins-src/frequencies1.py b/19-plugins/plugins-src/frequencies1.py
new file mode 100644
index 0000000..5171cbb
--- /dev/null
+++ b/19-plugins/plugins-src/frequencies1.py
@@ -0,0 +1,18 @@
+import operator
+
+def top25(word_list):
+    """
+    Takes a list of words and returns a dictionary associating
+    words with frequencies of occurrence
+    """
+    if type(word_list) is not list or word_list == []:
+        return {}
+
+    word_freqs = {}
+    for w in word_list:
+        if w in word_freqs:
+            word_freqs[w] += 1
+        else:
+            word_freqs[w] = 1
+    return sorted(word_freqs.iteritems(), key=operator.itemgetter(1), reverse=True)[:25]
+
diff --git a/19-plugins/plugins-src/frequencies2.py b/19-plugins/plugins-src/frequencies2.py
new file mode 100644
index 0000000..016ce66
--- /dev/null
+++ b/19-plugins/plugins-src/frequencies2.py
@@ -0,0 +1,10 @@
+import operator, collections
+
+def top25(word_list):
+    """
+    Takes a list of words and returns a dictionary associating
+    words with frequencies of occurrence
+    """
+    counts = collections.Counter(w for w in word_list)
+    return counts.most_common(25)
+
diff --git a/19-plugins/plugins-src/words1.py b/19-plugins/plugins-src/words1.py
new file mode 100644
index 0000000..b90594e
--- /dev/null
+++ b/19-plugins/plugins-src/words1.py
@@ -0,0 +1,31 @@
+import sys, re, string
+
+def extract_words(path_to_file):
+    """
+    Takes a path to a file and returns the non-stop
+    words, after properly removing nonalphanumeric chars
+    and normalizing for lower case
+    """
+    if type(path_to_file) is not str or not path_to_file:
+        return []
+
+    try:
+        with open(path_to_file) as f:
+            str_data = f.read()
+    except IOError as e:
+        print "I/O error({0}) when opening {1}: {2}".format(e.errno, path_to_file, e.strerror)
+        return []
+    
+    pattern = re.compile('[\W_]+')
+    word_list = pattern.sub(' ', str_data).lower().split()
+
+    try:
+        with open('../stop_words.txt') as f:
+            stop_words = f.read().split(',')
+    except IOError as e:
+        print "I/O error({0}) when opening ../stops_words.txt: {1}".format(e.errno, e.strerror)
+        return []
+
+    stop_words.extend(list(string.ascii_lowercase))
+    return [w for w in word_list if not w in stop_words]
+
diff --git a/19-plugins/plugins-src/words2.py b/19-plugins/plugins-src/words2.py
new file mode 100644
index 0000000..f314f22
--- /dev/null
+++ b/19-plugins/plugins-src/words2.py
@@ -0,0 +1,12 @@
+import sys, re, string
+
+def extract_words(path_to_file):
+    """
+    Takes a path to a file and returns the non-stop
+    words, after properly removing nonalphanumeric chars
+    and normalizing for lower case
+    """
+    words = re.findall('[a-z]{2,}', open(path_to_file).read().lower())
+    stopwords = set(open('../stop_words.txt').read().split(','))
+    return [w for w in words if w not in stopwords]
+
diff --git a/19-plugins/plugins/frequencies1.pyc b/19-plugins/plugins/frequencies1.pyc
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index 0000000..a204d1f
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diff --git a/19-plugins/plugins/frequencies2.pyc b/19-plugins/plugins/frequencies2.pyc
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index 0000000..30e5286
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diff --git a/19-plugins/plugins/words1.pyc b/19-plugins/plugins/words1.pyc
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diff --git a/19-plugins/plugins/words2.pyc b/19-plugins/plugins/words2.pyc
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index 0000000..699a7e5
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diff --git a/19-plugins/tf-19.py b/19-plugins/tf-19.py
new file mode 100644
index 0000000..13d8b46
--- /dev/null
+++ b/19-plugins/tf-19.py
@@ -0,0 +1,23 @@
+#!/usr/bin/env python
+
+import sys, ConfigParser, imp
+
+def load_plugins():
+    config = ConfigParser.ConfigParser()
+    config.read("config.ini")
+    words_plugin = config.get("Plugins", "words")
+    frequencies_plugin = config.get("Plugins", "frequencies")
+    global tfwords, tffreqs
+    tfwords = imp.load_compiled('tfwords', words_plugin)
+    tffreqs = imp.load_compiled('tffreqs', frequencies_plugin)
+
+#
+# The main function
+#
+
+load_plugins()
+word_freqs = tffreqs.top25(tfwords.extract_words(sys.argv[1]))
+
+for tf in word_freqs:
+    print tf[0], ' - ', tf[1]
+