corral vs quadrangle

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. 

quadrangle

noun
  • A courtyard which is quadrangular. 

  • The buildings forming the border of such a courtyard. 

  • A geometric shape with four angles and four straight sides; a four-sided polygon. 

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