disinclination vs proclivity

disinclination

noun
  • The state of being disinclined; want of propensity, desire, or affection; slight aversion or dislike 

proclivity

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

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