hunting-crop vs rawhide

hunting-crop

noun
  • A hunting whip, without a thong, that can be used for opening gates. 

rawhide

noun
  • A whip made from twisted untanned leather. 

  • Untanned hide. 

verb
  • To clear (a pump) of sediment by starting and stopping it repeatedly. 

  • To beat with a rawhide whip. 

How often have the words hunting-crop and rawhide occurred in a corpus of books? (source: Google Ngram Viewer )