kennel vs sentry-box

kennel

noun
  • A house or shelter for a dog. 

  • The dogs kept at such a facility; a pack of hounds. 

  • The hole of a fox or other animal. 

  • A facility at which dogs are reared or boarded. 

verb
  • To house or board a dog (or less commonly another animal). 

  • To lie or lodge; to dwell, as a dog or a fox. 

  • To drive (a fox) to covert in its hole. 

sentry-box

noun
  • A booth erected to provide rudimentary shelter to a sentry on his post. 

How often have the words kennel and sentry-box occurred in a corpus of books? (source: Google Ngram Viewer )