18-wheeler vs handcart

18-wheeler

noun
  • A big rig truck: a semi-trailer plus the truck or tractor pulling it. 

handcart

noun
  • A cart designed to be pulled or pushed by hand (as opposed to with a beast of burden.) 

verb
  • To transport in this kind of cart. 

How often have the words 18-wheeler and handcart occurred in a corpus of books? (source: Google Ngram Viewer )