thrall vs tyranny

thrall

noun
  • The state of being under the control of another person. 

  • One who is enslaved or under mind control. 

  • A shelf; a stand for barrels, etc. 

verb
  • To make a thrall; enslave. 

tyranny

noun
  • A system of government in which power is exercised on behalf of the ruler or ruling class, without regard to the wishes of the governed. 

  • A government in which a single ruler (a tyrant) has absolute power; this system of government. 

  • The office or jurisdiction of an absolute ruler. 

  • Extreme severity or rigour. 

  • Absolute power, or its use. 

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