fender vs paddle box

fender

noun
  • any shaped cushion-like object normally made from polymers, rubber or wood that is placed along the sides of a boat to prevent damage when moored alongside another vessel or jetty, or when using a lock, etc. Modern variations are cylindrical although older wooden version and rubbing strips can still be found; old tyres are used as a cheap substitute 

  • a low metal framework in front of a fireplace, intended to catch hot coals, soot, and ash 

  • panel of a car which encloses the wheel area, especially the front wheels 

  • a shield, usually of plastic or metal, on a bicycle that protects the rider from mud or water 

verb
  • To use fenders to protect the side of a boat 

paddle box

noun
  • An enclosed structure around a paddlewheel. 

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