aptitude vs penchant

aptitude

noun
  • The condition of being suitable. 

  • Natural ability to acquire knowledge or skill. 

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. 

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