frig vs sexual relation

frig

noun
  • An act of frigging. 

  • A temporary modification to a piece of equipment to change the way it operates (usually away from as originally designed). 

  • A fuck. 

  • Dated spelling of fridge. 

verb
  • to masturbate 

  • to mess or muck (about, around etc.) 

  • to fuck; to have sex. 

  • to make a temporary alteration to something, to fudge, to manipulate 

sexual relation

noun
  • Behaviour of a sexual nature between one or more individuals. 

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