onanism vs self-love

onanism

noun
  • Masturbation. 

  • Ejaculating outside the vagina during intercourse; (the performing of) coitus interruptus. 

self-love

noun
  • Masturbation. 

  • Regard for oneself; love of oneself. 

  • Excessive pride or vanity, overvaluing the self. 

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