jerking off vs self-abuse

jerking off

noun
  • An act of masturbation. 

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 jerking off and self-abuse occurred in a corpus of books? (source: Google Ngram Viewer )