milt vs sperm

milt

noun
  • The semen of a male fish. 

  • The spleen, especially of an animal bred for food. 

verb
  • To impregnate (the roe of a fish) with milt. 

sperm

noun
  • Semen; the generative substance of male animals. 

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

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

verb
  • To ejaculate on or into. 

  • To ejaculate. 

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