backboard vs starboard

backboard

noun
  • The port or larboard side of a ship 

  • A spine board. 

  • A board placed at the back of a cart, boat, etc. 

  • The flat vertical surface to which the basket is attached. 

  • A flat vertical wall with the image of a tennis net drawn or painted on it, designed to practice hitting against such that the ball rebounds. 

verb
  • To place (a patient) on a spine board. 

starboard

noun
  • The righthand side of a ship, boat or aircraft when facing the front, or fore or bow. Used to unambiguously refer to directions according to the sides of the vessel, rather than those of a crew member or object. 

  • One of the two traditional watches aboard a ship standing a watch in two. 

verb
  • To put to the right, or starboard, side of a vessel. 

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