milt vs soft roe

milt

verb

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

noun

  • The semen of a male fish. 

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

soft roe

noun

  • milt 

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