buy vs freight

buy

verb
  • To obtain (something) in exchange for money or goods. 

  • To make a purchase or purchases, to treat (for a drink, meal or gift) 

  • To make a bluff, usually a large one. 

  • To bribe. 

  • To be equivalent to in value. 

  • To obtain, especially by some sacrifice. 

  • to accept as true; to believe 

noun
  • Something which is bought; a purchase. 

freight

verb
  • To transport (goods). 

  • To load or store (goods, etc.). 

  • To carry (something) as if it is a burden or load. 

  • Chiefly followed by up: to carry as part of a cargo. 

  • To load (a vehicle or vessel) with freight (cargo); also, to hire or rent out (a vehicle or vessel) to carry cargo or passengers. 

noun
  • Payment for transportation. 

  • Goods or items in transport; cargo, luggage. 

  • A burden, a load. 

  • The transportation of goods (originally by water; now also (chiefly US) by land); also, the hiring of a vehicle or vessel for such transportation. 

  • Cultural or emotional associations. 

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