cat-o'-nine-tails vs hunting-crop

cat-o'-nine-tails

noun
  • A scourge (multi-tail whip) having nine, often knotted, whipcords, formerly used for flogging as naval punishment. 

  • A similarly constructed leather nine-tail whip, as used in British penal colonies and certain armies. 

hunting-crop

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

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