freight vs swap out

freight

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

  • To load or store (goods, etc.). 

  • To transport (goods). 

  • 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. 

swap out

verb
  • To exchange (something or someone) for an unused (or less-used) equivalent. 

  • To exchange (something) for (something else). (usually followed by with or for) 

  • To transfer (memory contents) into a swap file. 

noun
  • Anything that is swapped out for another; an exchange. 

  • A pre-prepared food item used in place of an unfinished food item in order to cut down the overall preparation time during filming. 

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