horsewhip vs sjambok

horsewhip

verb
  • To flog or lash with a horsewhip. 

noun
  • A whip for use on horses. 

sjambok

verb
  • To whip with a sjambok; to horsewhip. 

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

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