coitus interruptus vs self-love

coitus interruptus

noun
  • Sexual intercourse interrupted by withdrawal of the penis before ejaculation. 

self-love

noun
  • Masturbation. 

  • Regard for oneself; love of oneself. 

  • Excessive pride or vanity, overvaluing the self. 

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