lather vs swither

lather

verb
  • To beat or whip. 

  • To form lather or froth, as a horse does when profusely sweating. 

  • To cover with lather. 

noun
  • A state of agitation. 

  • The foam made by rapidly stirring soap and water. 

  • Foam from profuse sweating, as of a horse. 

swither

verb
  • To move or swing about. 

  • To be indecisive or in a state of confusion; to dither. 

noun
  • A state of indecision or confusion; a panicked state; a flap, fluster, or dither. 

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