deal in vs swap

deal in

verb
  • To trade (buy and sell) a named commodity. 

  • To accept (something or a piece of information) as a basis for a decision. 

  • To deal cards to someone entering a game; to enter someone into a game by dealing cards to that person. 

  • To have an interest in something. 

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. 

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