etching vs intaglio

etching

noun
  • The art of producing an image from a metal plate into which an image or text has been etched with acid. 

  • The image created by this process. 

intaglio

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

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

verb
  • To engrave or etch using intaglio. 

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