plainness vs stencil

plainness

noun
  • The product or result of being plain 

  • The condition of being plain (in all senses) 

stencil

verb
  • To print with a 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. 

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