flesher vs slaughterman

flesher

noun
  • A butcher. 

  • A person who removes the flesh from the skin during the making of leather. 

  • A tool used to remove the flesh from the skin during the making of leather. 

slaughterman

noun
  • A man employed to slaughter animals in a slaughterhouse. 

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