corral vs courtyard

corral

noun
  • An enclosure or area to concentrate a dispersed group. 

  • An enclosure for livestock, especially a circular one. 

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

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. 

courtyard

noun
  • An area, open to the sky, partially or wholly surrounded by walls or buildings. 

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