knack vs skillage

knack

noun
  • A readiness in performance; aptness at doing something. 

  • A petty contrivance; a toy. 

  • Something performed, or to be done, requiring aptness and dexterity. 

verb
  • To speak affectedly. 

skillage

noun
  • The state of being highly skilled, the state of being skillful. 

  • The differentiating, or skilling, of call distribution based on an individual's skill level, expertise, or training. 

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