dray vs freightwagon

dray

noun
  • A low horse-drawn cart, often without sides, and used especially for heavy loads. 

  • A kind of sledge or sled. 

freightwagon

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

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