autocratic vs tyrannous

autocratic

adj
  • Of or pertaining to autocracy or to an autocrat; absolute; holding independent and arbitrary powers of government. 

  • Of or pertaining to the manner of an autocrat. 

tyrannous

adj
  • Tyrannical, despotic or oppressive. 

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