pinfold vs stockyard

pinfold

noun
  • An open enclosure for animals, especially an area where stray animals were rounded up if their owners failed to properly supervise their use of common grazing land. 

verb
  • To confine (animals) in a pinfold. 

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 pinfold and stockyard occurred in a corpus of books? (source: Google Ngram Viewer )