photocopy vs stencil

photocopy

noun
  • A copy made using a photocopier. 

verb
  • To make a copy using a photocopier. 

stencil

noun
  • A two-ply master sheet for use with a mimeograph. 

  • A thin sheet, either perforated or using some other technique, with which a pattern may be produced upon a surface; a utensil that contains a perforated sheet. 

  • A pattern produced using such a utensil. 

verb
  • To print with a stencil. 

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