purchase vs swap out

purchase

verb
  • To buy, obtain by payment of a price in money or its equivalent. 

  • To apply to (anything) a device for obtaining a mechanical advantage; to get a purchase upon, or apply a purchase to; to raise or move by mechanical means. 

  • To pursue and obtain; to acquire by seeking; to gain, obtain, or acquire. 

  • To constitute the buying power for a purchase, have a trading value. 

  • To obtain by any outlay, as of labor, danger, or sacrifice, etc. 

  • To put forth effort to obtain anything; to strive; to exert oneself. 

  • To expiate by a fine or forfeit. 

noun
  • A price paid for a house or estate, etc. equal to the amount of the rent or income during the stated number of years. 

  • The apparatus, tackle or device by which such mechanical advantage is gained and in nautical terminology the ratio of such a device, like a pulley, or block and tackle. 

  • The amount of hold one has from an individual foothold or ledge. 

  • Any mechanical hold or advantage, applied to the raising or removing of heavy bodies, as by a lever, a tackle or capstan. 

  • That which is obtained for a price in money or its equivalent. 

  • The acquisition of title to, or property in, anything for a price; buying for money or its equivalent. 

  • That which is obtained, got or acquired, in any manner, honestly or dishonestly; property; possession; acquisition. 

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