mezzotint vs serrate

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. 

serrate

verb
  • To make serrate. 

  • To cut or divide in a jagged way. 

adj
  • Of leaves: having tooth-like projections pointed away from the petiole. 

  • Having tooth-like projections on one side, as in a saw. 

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