knack vs maestria

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. 

maestria

noun
  • mastery, skill 

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