flail vs sjambok

flail

verb
  • To thresh. 

  • To beat using a flail or similar implement. 

  • To wave or swing vigorously 

  • To move like a flail. 

noun
  • A weapon which has the (usually spherical) striking part attached to the handle with a flexible joint such as a chain. 

  • A tool used for threshing, consisting of a long handle with a shorter stick attached with a short piece of chain, thong or similar material. 

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