penchant vs proclivity

penchant

noun
  • Taste, liking, or inclination (for). 

  • A card game resembling bezique. 

  • In the game of penchant, any queen and jack of different suits held at the same time. 

proclivity

noun
  • A predisposition or natural inclination, propensity, or a predilection; especially, a strong disposition or bent. 

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