diff --git a/docker/Dockerfile b/docker/Dockerfile
index 9fe1a6d..5f47e88 100644
--- a/docker/Dockerfile
+++ b/docker/Dockerfile
@@ -38,7 +38,8 @@ RUN apt-get update && apt-get install -y \
         tree \
         vim \
         nano \
-        device-tree-compiler
+        device-tree-compiler \
+	pmccabe
 
 # Install python packages
 RUN pip3 install \
@@ -56,7 +57,8 @@ RUN pip3 install \
         pyspellchecker \
         ROPgadget \
         capstone \
-        GitPython
+        GitPython \
+	pygount
 
 # Install javascript packages
 RUN npm install -g cspell@latest
diff --git a/his_checker.py b/his_checker.py
index 9f2a17d..7048be5 100755
--- a/his_checker.py
+++ b/his_checker.py
@@ -9,6 +9,7 @@
 
 import sys
 import argparse
+import os
 
 def process_calling(files, threshold):
     """
@@ -30,12 +31,53 @@ def process_calls(files, threshold):
 
 def process_comf(files, threshold):
     """
-    Process the comf metric
-    """
+    Process the relationship of the number of comments (outside of and within functions) to the
+    number of statements. Statements are counted using the pmmcabe tool, while the comments are
+    counted using pygount.
 
-    print(f"Processing COMF metric with threshold >{threshold} for files: {', '.join(files)}")
+    Args:
+        files: A list of file paths to check ratio of comments to statements.
+        threshold: The minimum ratio allowed.
 
-    return 0
+    Returns:
+        The number of files that don't comply with comment ratio threshold.
+    """
+
+    metric_fail = 0
+    stmt_tool = "pmccabe -c "
+    stmt_index = 2
+    total_stmts = 0
+    cmnt_tool = "pygount --format=cloc-xml "
+    cmnt_index = 21
+    cmnt_density = 0
+    license_cmnt_size = 4
+
+    print("--------------------------------------------")
+    print(f"Processing COMF metric with threshold >{threshold}")
+    print("--------------------------------------------")
+
+    # Process each file
+    for file in files:
+        # Run 'pmccabe' on the file and split the output into lines
+        sline = os.popen(stmt_tool + str(file)).read().split('\n')
+
+        for fields in [line.split('\t') for line in sline[:-1]]:
+            stmts = int(fields[stmt_index])
+            total_stmts = total_stmts + stmts
+
+        # Run 'pygount' on the file and split the output into lines
+        lines = os.popen(cmnt_tool + str(file)).read().split(' ')
+
+        if lines[cmnt_index].startswith("comment"):
+            cmnts = int(lines[cmnt_index].split("=")[1].replace('"', ''))
+            cmnts = cmnts - license_cmnt_size
+            comment_density = cmnts/total_stmts
+            if comment_density < threshold:
+                print("At " + file + " comment density is " + comment_density)
+                metric_fail += 1
+        total_stmts = 0
+
+    return metric_fail
 
 def process_goto(files, threshold):
     """