fewness vs rarity

fewness

noun
  • The state, quality, or condition of being few. 

rarity

noun
  • Thinness; the property of having low density 

  • A measure of the scarcity of an object. 

  • A rare object. 

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