point of reference vs stencil

point of reference

noun
  • A unique, intellectual premise used to relate other to ideas. 

  • A particular location which is used as an endpoint when measuring distances or charting maps. 

stencil

noun
  • A pattern produced using such a utensil. 

  • 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. 

verb
  • To print with a stencil. 

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