sell vs swap out

sell

verb
  • To transfer goods or provide services in exchange for money. 

  • To be sold. 

  • To promote a particular viewpoint. 

  • To work as a prostitute. 

  • To betray for money or other things. 

  • To promote a product or service. 

  • To pretend that an opponent's blows or maneuvers are causing legitimate injury; to act. 

  • To trick, cheat, or manipulate someone. 

noun
  • An act of selling; sale. 

  • The promotion of an idea for acceptance. 

  • An easy task. 

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