bulwark vs escutcheon

bulwark

noun
  • The planking or plating along the sides of a nautical vessel above her gunwale that reduces the likelihood of seas washing over the gunwales and people being washed overboard. 

  • A defensive wall or rampart. 

  • A defense or safeguard. 

  • A breakwater. 

  • Any means of defence or security. 

verb
  • To fortify something with a wall or rampart. 

  • To provide protection of defense for something. 

escutcheon

noun
  • The part of a ship's stern where its name is displayed. 

  • A small shield used to charge a larger one. 

  • The insignia around a doorknob's exterior hardware or a door lock's cosmetic plate. 

  • A marking upon the back of a cow's udder and the space above it (the perineum), formed by the hair growing upward or outward instead of downward. It was once taken as an index of milking qualities. 

  • A decorative and/or protective plate or bezel to fill the gap between a switch, pipe, valve, control knob, etc., and the surface from which it protrudes. 

  • An individual or corporate coat of arms. 

  • The pattern of distribution of hair upon the pubic mound. 

  • The depression behind the beak of certain bivalves; the ligamental area. 

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