bust a nut vs sperm

bust a nut

verb
  • To ejaculate. 

  • To work very hard; to put in a lot of effort. 

sperm

verb
  • To ejaculate. 

  • To ejaculate on or into. 

noun
  • The reproductive cell or gamete of the male; a spermatozoon. 

  • Semen; the generative substance of male animals. 

  • Sperm oil; whale oil from a sperm whale; spermaceti. 

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