flat wagon vs forklift

flat wagon

noun
  • An open railway wagon without sides and roof, or with very low sides. 

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. 

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