ketch vs mahone

ketch

noun
  • A fore-and-aft rigged sailing vessel with two masts, main and mizzen, the mizzen being stepped forward of the rudder post. 

  • A hangman. 

verb
  • To hang. 

mahone

noun
  • A large Turkish ship. 

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