free vs swap out

free

noun
  • A free transfer. 

  • The usual means of restarting play after a foul is committed, where the non-offending team restarts from where the foul was committed. 

adj
  • Of a rocket or missile: not under the control of a guidance system after being launched. 

  • Thrown open, or made accessible, to all; to be enjoyed without limitations; unrestricted; not obstructed, engrossed, or appropriated; open; said of a thing to be possessed or enjoyed. 

  • Without obligations. 

  • With no or only freedom-preserving limitations on distribution or modification. 

  • Without; not containing (what is specified); exempt; clear; liberated. 

  • Privileged or individual; the opposite of common. 

  • (of a morpheme) That can be used by itself, unattached to another morpheme. 

  • Unconstrained. 

  • Unobstructed, without blockages. 

  • Unattached or uncombined. 

  • Not imprisoned or enslaved. 

  • Unconstrained by quantifiers. 

  • Not attached; loose. 

  • Unconstrained of identifiers, not bound. 

  • Not arbitrary or despotic; assuring liberty; defending individual rights against encroachment by any person or class; instituted by a free people; said of a government, institutions, etc. 

  • Unconstrained by timidity or distrust 

  • Intended for release, as opposed to a checked version. 

  • complimentary 

  • Unconstrained by relators. 

  • Obtainable without any payment. 

  • Generous; liberal. 

  • Not currently in use; not taken; unoccupied. 

adv
  • Without needing to pay. 

verb
  • To make free; set at liberty; release. 

  • To rid of something that confines or oppresses. 

  • To relinquish (previously allocated memory) to the system. 

swap out

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. 

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