crank one out vs fap

crank one out

verb
  • To masturbate. 

fap

verb
  • To masturbate. 

noun
  • A session of masturbation. 

intj
  • To indicate that someone (normally the speaker) is either masturbating, or inspired to by sexual arousal. 

  • Pornography. 

How often have the words crank one out and fap occurred in a corpus of books? (source: Google Ngram Viewer )