flail vs rute

flail

noun
  • 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. 

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

verb
  • To beat using a flail or similar implement. 

  • To wave or swing vigorously 

  • To thresh. 

  • To move like a flail. 

rute

noun
  • A bundle of thin sticks, typically made of wood, sometimes bond in such a way that binding can be moved so that it varies the tightness of the binding. 

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