swap vs swap out

swap

verb
  • To exchange or give (something) in an exchange (for something else). 

noun
  • An exchange of two comparable things. 

  • A financial derivative in which two parties agree to exchange one stream of cashflow against another stream. 

  • A social meal at a restaurant between two university societies, usually involving drinking and banter; commonly associated with fining and pennying; equivalent to a crewdate at Oxford University. 

  • Space available in a swap file for use as auxiliary memory. 

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