cat-o’-nine-tails vs rawhide

cat-o’-nine-tails

rawhide

verb

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

  • To beat with a rawhide whip. 

noun

  • Untanned hide. 

  • A whip made from twisted untanned leather. 

How often have the words cat-o’-nine-tails and rawhide occurred in a corpus of books? (source: Google Ngram Viewer )