rotation vs swap

rotation

noun
  • An operation on a metric space that is a continuous isometry and fixes at least one point. 

  • The step during takeoff when the pilot commands the vehicle to lift the nose wheel off the ground during the takeoff roll. (see also: V2) 

  • A regular variation in a sequence, such as to even-out wear, or people taking turns in a task; a duty roster. 

  • A single complete cycle around a centre or an axis. 

  • The act of turning around a centre or an axis. 

  • The set of starting pitchers of a team. 

  • Repeated play on a radio station, etc. 

  • The earth's rotation about its axis is responsible for its being slightly oblate rather than a sphere. 

swap

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

  • 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. 

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

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