aptness vs penchant

aptness

noun
  • proneness; tendency 

  • disposition of the mind; propensity 

  • suitability; the quality of being apt or suitable 

  • speed or readiness in learning; docility 

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 aptness and penchant occurred in a corpus of books? (source: Google Ngram Viewer )