forklift vs wheelchair

forklift

noun
  • A small industrial vehicle with a power-operated fork-like pronged platform that can be raised and lowered for insertion under a load, often on pallets, to be lifted and moved. 

verb
  • To move or stack with, or as if with, such a vehicle. 

wheelchair

noun
  • Any device involving wheels designed to assist a non-human animal with locomotion. 

  • A chair mounted on large wheels for the transportation or use of a sick or disabled person. 

  • Designed for use by wheelchairbound people. 

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