handrail vs railroad track

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. 

railroad track

noun
  • A pair of formed steel rails, separated and supported usually on wooden or concrete ties or sleepers, forming a track along which flange-wheeled railroad vehicles may travel. 

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