earl vs royal

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. 

royal

noun
  • Any of various lycaenid butterflies. 

  • A tuft of beard on the lower lip. 

  • A small mortar. 

  • Bell changes rung on ten bells. 

  • The fourth tine of an antler's beam. 

  • An old English gold coin, the rial. 

  • A standard size of writing paper, measuring 24 by 19 inches. 

  • In auction bridge, a royal spade. 

  • A standard size of printing paper, measuring 25 by 20 inches. 

  • In large sailing ships, square sail over the topgallant sail. 

  • A stag with twelve points (six on each antler). 

  • A royal person; a member of a royal family. 

adj
  • Used as an intensifier. 

  • Having the air or demeanour of a monarch; illustrious; magnanimous; of more than common size or excellence. 

  • Of or relating to a monarch or their family. 

  • In large sailing ships, of a mast right above the topgallant mast and its sails. 

  • Free-for-all, especially involving multiple combatants. 

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