mezzotint vs subdivision

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. 

subdivision

verb
  • To separate something into smaller pieces. 

noun
  • Such a piece that has been divided. 

  • A division into smaller pieces of something that has already been divided. 

  • A parcel of land that has been divided into lots. 

  • A group of houses created by the same builder or in the same general area. 

  • A gated community. 

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