engraving vs mezzotint

engraving

noun
  • The art of producing an image from an engraved printing form, typically made of copper. 

  • A print produced from an engraving. 

  • The art of drawing music notation at high quality, particularly on a computer. 

  • The practice of incising a design onto a hard, flat surface, by cutting grooves into it. 

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 engraving and mezzotint occurred in a corpus of books? (source: Google Ngram Viewer )