swap out vs traffic

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. 

traffic

verb
  • To pass goods and commodities from one person to another for an equivalent in goods or money; to buy or sell goods. 

  • To exchange in traffic; to effect by a bargain or for a consideration. 

  • To trade meanly or mercenarily; to bargain. 

adj
  • congested 

noun
  • The amount of attention paid to a particular printed page etc. in a publication. 

  • Commercial transportation or exchange of goods, or the movement of passengers or people. 

  • In CB radio, formal written messages relayed on behalf of others. 

  • Exchange or flux of information, messages or data, as in a computer or telephone network. 

  • Commodities of the market. 

  • Moving pedestrians or vehicles, or the flux or passage thereof. 

  • Illegal trade or exchange of goods, often drugs. 

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