commanding vs mastery

commanding

noun
  • The act of giving a command. 

adj
  • Tending to give commands, authoritarian. 

  • Impressively dominant. 

  • Dominating from above, giving a wide view 

mastery

noun
  • The act or process of mastering; the state of having mastered; expertise. 

  • Superiority in war or competition; victory; triumph; preeminence. 

  • The position or authority of a master; dominion; command; supremacy; superiority. 

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