harbor vs swap out

harbor

noun
  • A mixing box for materials. 

  • A sheltered expanse of water, adjacent to land, in which ships may anchor or dock, especially for loading and unloading. 

  • Any place of shelter. 

  • A harbor, even if it is a little harbor, is a good thing, since adventurers come into it as well as go out, and the life in it grows strong, because it takes something from the world, and has something to give in return - Sarah Orne Jewett 

verb
  • To take refuge or shelter in a protected expanse of water. 

  • To drive (a hunted stag) to covert. 

  • To hold or persistently entertain in one's thoughts or mind. 

  • To provide a harbor or safe place for. 

swap out

noun
  • A pre-prepared food item used in place of an unfinished food item in order to cut down the overall preparation time during filming. 

  • Anything that is swapped out for another; an exchange. 

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. 

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