handrail vs transom

handrail

noun
  • A rail which can be held, such as on the side of a staircase, ramp or other walkway, and serving as a support or guard. 

  • A moving continuous belt-like rail on either side of an escalator which users can hold on to for support. 

transom

noun
  • The horizontal beam on a cross or gallows. 

  • The flat or nearly flat stern of a boat or ship. 

  • A crosspiece over a door; a lintel. 

  • Any of several transverse structural members in a ship, especially at the stern; a thwart. 

  • Items that have arrived over the transom. 

  • A transom window. 

  • A horizontal dividing bar in a window. 

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