intromission vs snu snu

intromission

noun
  • the act of allowing to enter; admission 

  • copulation: normally refers to the first moment of initial entry of a penis into a vagina, mouth or anus. 

  • An intermeddling with the affairs of another, either on legal grounds or without authority. 

  • the state of being allowed to enter; admittance 

  • putting one thing into another; insertion 

snu snu

noun
  • Sexual intercourse with a tall/muscular woman. 

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