1# Iterate over the column in dataframe
 2      for entry in col:
 3
 4        # If entry is in cols_count, add 1
 5       if entry in cols_count.keys():
 6          cols_count[entry] += 1
 7     # Else add the entry to cols_count, set the value to 1
 8    else:
 9       cols_count[entry] = 1
 10
 11      # Return the cols_count dictionary
 12     return cols_count