affine vs winnow

affine

verb
  • To refine. 

adj
  • Of or pertaining to a function expressible as f(⃑x)=A⃑x+⃑b (where A is a linear transformation and ⃑b is a constant), which, regarded as a transformation, maps parallel lines to parallel lines and finite points to finite points. 

  • Assigning finite values to finite quantities. 

  • Of two materials, having mutual affinity. 

noun
  • A relative by marriage. 

winnow

verb
  • To blow upon or toss about by blowing; to set in motion as with a fan or wings. 

  • To separate, sift, analyse, or test by separating items having different values. 

  • To subject (granular material, especially food grain) to a current of air separating heavier and lighter components, as grain from chaff. 

noun
  • That which winnows or which is used in winnowing; a contrivance for fanning or winnowing grain. 

  • The act of winnowing 

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