cavalier vs sapper

cavalier

noun
  • A gentleman of the class of such officers 

  • Someone with an uncircumcised penis. 

  • A defensive work rising from a bastion, etc., and overlooking the surrounding area. 

  • A military man serving on horse, (chiefly) early modern cavalry officers who had abandoned the heavy armor of medieval knights. 

  • A Cavalier King Charles Spaniel, a small breed of spaniel of English origin with a silky, smooth coat and commonly a smooth undocked tail. 

  • A gallant: a sprightly young dashing military man. 

  • A courtesan or noble under Charles I of England, particularly a royalist partisan during the English Civil War which ended his reign. 

adj
  • Of or pertaining to the party of King Charles I of England (1600–1649). 

  • High-spirited. 

  • Not caring enough about something important. 

  • Supercilious. 

sapper

noun
  • An officer or private of the Royal Engineers. 

  • Historical term for a combat engineer that is still used in some armies, in other words an engineer or a soldier engaged in attacking, destroying, and circumventing or building fortifications, bridges, and roads; a military engineer active in a combat zone. 

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