The charge for transporting something by common carrier(noun)
WordNet. Princeton University. 2010.
Use "freight rate" in a sentence
"These southern young New Dealers would meet and have dinner together once or twice a month and discuss things about the South and you know, it was all white in [unknown] the first place and it was all kind of these high echelon people, you know, in the Senate and the House and in the New Deal agencies and they would discuss freight rate differential and that was a big thing, you know, because that was really something that they felt was holding the South back terribly."