comment vs riff

comment

noun
  • A spoken or written remark. 

  • A remark embedded in source code in such a way that it will be ignored by the compiler or interpreter, typically to help people to understand the code. 

  • The part of a sentence that provides new information regarding the current theme. 

  • The act of commenting. 

verb
  • To make remarks or notes. 

  • To insert comments into (source code). 

  • To comment out (code); to disable by converting into a comment. 

  • To remark. 

riff

noun
  • A clever or witty remark. 

  • A spoof. 

  • Listen to one of the greatest guitar riffs of all time! 

  • A variation on something. 

  • A repeated instrumental melody line in a song. 

verb
  • To improvise in the performance or practice of an art, especially by expanding on or making novel use of traditional themes. 

  • To riffle. 

How often have the words comment and riff occurred in a corpus of books? (source: Google Ngram Viewer )