earl vs monarch

earl

noun
  • Any of various nymphalid butterflies of the genus Tanaecia. Other butterflies in this genus are called counts and viscounts. 

  • A British or Irish nobleman next in rank above a viscount and below a marquess; equivalent to a European count. A female using the style is termed a countess. 

monarch

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

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

  • 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 earl and monarch occurred in a corpus of books? (source: Google Ngram Viewer )