merchantable vs trafficable

merchantable

adj
  • Fit for the market, i.e. suitable for selling for an ordinary price. Sometimes, this is a technical designation for a particular kind or class. 

trafficable

adj
  • Able to be trafficked or traded; marketable. 

  • Having good trafficability: of a vehicle, able to traverse terrain; of terrain, able to support vehicle movement. 

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