flitch vs mezzotint

flitch

verb
  • To cut into, or off in, flitches or strips. 

noun
  • The flank or side of an animal, now almost exclusively a pig when cured and salted; a side of bacon. 

  • A piece or strip cut off of something else, generally a piece of wood (timber). 

mezzotint

verb
  • To make such etchings 

noun
  • A form of intaglio etching in which a metal plate is roughened evenly and then smoothed to bring out an image. 

  • An etching or print made using this method. 

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