bargain vs swap out

bargain

verb
  • To make a bargain; to make a deal or contract for the exchange of property or services; to negotiate 

  • To transfer for a consideration; to barter; to trade 

noun
  • An item purchased for significantly less than the usual, or recommended, price 

  • A gainful transaction; an advantageous purchase. 

  • An agreement between parties concerning the sale of property; or a contract by which one party binds himself to transfer the right to some property for a consideration, and the other party binds himself to receive the property and pay the consideration. 

  • The thing stipulated or purchased. 

  • An agreement or stipulation; mutual pledge. 

swap out

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

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

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

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 bargain and swap out occurred in a corpus of books? (source: Google Ngram Viewer )