flail vs wamble

flail

verb
  • To move like a flail. 

  • To beat using a flail or similar implement. 

  • To wave or swing vigorously 

  • To thresh. 

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. 

wamble

verb
  • To wobble, to totter, to waver; to walk with an unsteady gait. 

  • To twist and turn; to wriggle; to roll over. 

  • To feel nauseous, to churn (of stomach). 

noun
  • An unsteady walk; a staggering or wobbling. 

  • A rumble of the stomach. 

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