pigsticker vs slaughterman

pigsticker

noun
  • A pork butcher. 

  • A spike bayonet 

  • A hunter of wild boar. 

  • A large knife, used as a weapon. 

  • A sled with a pointed front. 

  • A horse well-suited to hunt wild boar. 

slaughterman

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

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