barbell vs handrail

barbell

noun
  • A wide steel bar with premeasured weights affixed to either end, with the central span open for the hands of the weightlifter. 

  • A piece of jewellery composed of a straight bar with a bead on each end, used as a piercing. 

handrail

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

  • 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. 

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