earl vs lady

earl

noun
  • 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. 

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

lady

noun
  • A title that can be used instead of the formal terms of marchioness, countess, viscountess, or baroness. 

  • A title for someone married to a lord or gentleman. 

  • A woman’s breast. 

  • A polite reference or form of address to women. 

  • A woman: an adult female human. 

  • A wife or girlfriend; a sweetheart. 

  • A queen (the playing card). 

  • A woman of breeding or higher class, a woman of authority. 

  • A woman to whom the particular homage of a knight was paid; a woman to whom one is devoted or bound. 

  • The mistress of a household. 

  • The feminine of lord. 

  • Toilets intended for use by women. 

  • Used to address a female. 

  • Who is a woman. 

  • A five-pound note. (Rhyming slang, Lady Godiva for fiver.) 

  • A queen. 

verb
  • To address as “lady”. 

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