cat-o'-nine-tails vs quirt

cat-o'-nine-tails

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

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

quirt

noun
  • A rawhide whip plaited with two thongs of buffalo hide. 

verb
  • To strike with a quirt. 

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