gip vs rip off

gip

verb
  • To take out the entrails of (herrings). 

  • to retch 

noun
  • A servant; a gyp. 

rip off

verb
  • To pull off by ripping 

  • To steal, cheat or swindle. Especially to charge an exorbitant or unfair rate. 

  • To copy, especially illegally. 

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