authoritarianism vs tyranthood

authoritarianism

noun
  • A form of government in which the governing body has absolute, or almost absolute, control. Typically this control is maintained by force, and little heed is paid to public opinion or the judicial system. 

tyranthood

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

  • The state or condition of being a tyrant. 

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