intaglio vs mezzotint

intaglio

noun
  • Any printing method in which the ink is laid upon the sunken parts of the printing form. 

  • A design or piece of art which is engraved or etched into something. 

verb
  • To engrave or etch using intaglio. 

mezzotint

noun
  • An etching or print made using this method. 

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

verb
  • To make such etchings 

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