quirt vs sjambok

quirt

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

verb
  • To strike with a quirt. 

sjambok

noun
  • A stout whip, especially made of rhinoceros or hippopotamus hide. 

verb
  • To whip with a sjambok; to horsewhip. 

How often have the words quirt and sjambok occurred in a corpus of books? (source: Google Ngram Viewer )