plank vs starboard

plank

verb
  • To cover something with planking. 

  • To pose for a photograph while lying rigid, face down, arms at side, in an unusual place. 

  • To lay down, as on a plank or table; to stake or pay cash. 

  • To harden, as hat bodies, by felting. 

  • To bake (fish, etc.) on a piece of cedar lumber. 

  • To splice together the ends of slivers of wool, for subsequent drawing. 

noun
  • Physical exercise in which one holds a pushup position for a measured length of time. 

  • A stupid person, idiot. 

  • A long, broad and thick piece of timber, as opposed to a board which is less thick. 

  • That which supports or upholds. 

  • A political issue that is of concern to a faction or a party of the people and the political position that is taken on that issue. 

starboard

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

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. 

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