pocket pool vs self-abuse

pocket pool

noun
  • The act of manipulating one's genitalia through a trouser pocket; masturbation. 

  • A variation of the game of pool. 

self-abuse

noun
  • Physical or verbal maltreatment of oneself. 

  • Injury inflicted deliberately upon oneself, especially resulting from a mental disorder. 

verb
  • To harm oneself. 

How often have the words pocket pool and self-abuse occurred in a corpus of books? (source: Google Ngram Viewer )