beau vs esquire

beau

noun
  • A male escort. 

  • A suitor of a lady. 

esquire

noun
  • A gentleman who attends or escorts a lady in public. 

  • A male member of the gentry ranking below a knight. 

  • A lawyer. 

  • A bearing somewhat resembling a gyron, but extending across the field so that the point touches the opposite edge of the escutcheon. 

  • An honorific sometimes placed after a man's name. 

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