mimeograph vs monoprint

mimeograph

noun
  • A machine for making printed copies using typed stencil, eventually superseded by photocopying. 

verb
  • To make mimeograph copies. 

monoprint

noun
  • A form of printing on paper from a glass sheet to which oil paint has been applied; monotype. 

verb
  • To print using this technique. 

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