milt vs semen

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. 

semen

noun
  • A sticky, milky fluid produced in male reproductive organs that contains the reproductive cells. 

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