mastery vs tyranthood

mastery

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

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

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

tyranthood

noun
  • The state or condition of being a tyrant. 

  • A governmental system based on a single ruler wielding absolute authority; tyranny. 

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