dictator vs monarch

dictator

noun
  • A totalitarian leader of a country, nation, or government. 

  • A person who dictates text (e.g. letters to a clerk). 

  • A tyrannical boss or authority figure. 

  • A magistrate without colleague in republican Ancient Rome, who held full executive authority for a term granted by the senate (legislature), typically to conduct a war. 

monarch

noun
  • The ruler of an absolute monarchy or the head of state of a constitutional monarchy. 

  • The monarch butterfly, Danaus plexippus, and others of genus Danaus, found primarily in North America, so called because of the designs on its wings. 

  • A stag which has sixteen or more points or tines on its antlers. 

  • The chief or best thing of its kind. 

  • A police officer. 

  • Any bird of the family Monarchidae. 

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