corral vs set free

corral

noun
  • An enclosure for livestock, especially a circular one. 

  • A circle of wagons, either for the purpose of trapping livestock, or for defense. 

  • An enclosure or area to concentrate a dispersed group. 

verb
  • To make a circle of vehicles, as of wagons so as to form a corral. 

  • To capture or round up. 

  • To place inside of a corral. 

set free

verb
  • To release, to free, to give freedom to. 

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