Source : Webster's Revised Unabridged Dictionary (1913)

Freightage \Freight"age\, n.
   1. Charge for transportation; expense of carriage.

   2. The transportation of freight.

   3. Freight; cargo; lading. Milton.

Source : WordNet®

freightage
     n 1: the charge for transporting something by common carrier; "we
          pay the freight"; "the freight rate is usually cheaper"
          [syn: {freight}, {freight rate}]
     2: transporting goods commercially at rates cheaper than
        express rates [syn: {freight}]