knob-end vs organ

knob-end

noun
  • The glans penis 

  • Used other than figuratively or idiomatically: see knob, end. The end of something that is shaped into a knob. 

  • A stupid or contemptible person 

organ

noun
  • The penis. 

  • The larger part of an organism, composed of tissues that perform similar functions. 

  • A government organization; agency; authority. 

  • A musical instrument that has multiple pipes which play when a key is pressed (the pipe organ), or an electronic instrument designed to replicate such. 

  • A body of an organization dedicated to the performing of certain functions. 

  • An official magazine, newsletter, or similar publication of an organization. 

  • An Asian form of mitrailleuse. 

How often have the words knob-end and organ occurred in a corpus of books? (source: Google Ngram Viewer )