kraal vs schoolyard

kraal

noun
  • An enclosure for livestock. 

  • In Central and Southern Africa, a small rural community. 

  • In Central and Southern Africa, a rural village of huts surrounded by a stockade. 

verb
  • To enclose (livestock) within a kraal or stockade. 

schoolyard

noun
  • The grounds around a school. 

  • An open field near a school used for recreation by the students. 

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