poon vs sexual relation

poon

noun
  • Poontang, the vagina, or, intercourse with a woman. 

  • A wimp; a pussy. 

  • Any of several East Indian trees of the genus Calophyllum, yielding a light, hard wood used for masts, spars, etc. 

sexual relation

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

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