nagaika vs sjambok

nagaika

noun
  • A short, thick braided whip with a round cross-section, used by the Cossacks. 

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 nagaika and sjambok occurred in a corpus of books? (source: Google Ngram Viewer )