gunman vs pigsticker

gunman

noun
  • A criminal armed with a gun, especially a professional killer. 

pigsticker

noun
  • A large knife, used as a weapon. 

  • A spike bayonet 

  • A hunter of wild boar. 

  • A pork butcher. 

  • A sled with a pointed front. 

  • A horse well-suited to hunt wild boar. 

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