conflate vs mezzotint

conflate

verb
  • To mix together different elements. 

  • To bring (things) together and fuse (them) into a single entity. 

  • To fail to properly distinguish or keep separate (things); to mistakenly treat (them) as equivalent. 

noun
  • A conflate text, one which conflates multiple version of a text together. 

adj
  • Combining elements from multiple versions of the same text. 

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