bawn vs stockyard

bawn

noun
  • A cattle-fort; a building used to shelter cattle. 

  • A defensive wall built around a tower house. It was once used to protect livestock during an attack. 

stockyard

noun
  • An enclosed yard, with pens, sheds etc. or stables, where livestock is kept temporarily before being slaughtered, treated, sold, or shipped etc. 

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