freightwagon vs semi-trailer truck

freightwagon

noun
  • Any vehicle, such as a cart, wagon, lorry, truck, or boxcar, used for carrying or transporting goods; a cargo truck. 

semi-trailer truck

noun
  • A tractor-trailer or big rig, consisting of a semi-trailer and a semitruck pulling it. 

How often have the words freightwagon and semi-trailer truck occurred in a corpus of books? (source: Google Ngram Viewer )