blocking vs mezzotint

blocking

noun
  • The precise movement and positioning of actors in order to facilitate a performance (originally planned using miniature blocks). 

  • Blocks used to support (a building, etc.) temporarily. 

  • A feature that prevents a keyboard from registering multiple simultaneous keypresses that would cause ghosting. 

  • The act by which something is blocked; an obstruction. 

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