lather vs sudation

lather

noun
  • Foam from profuse sweating, as of a horse. 

  • A state of agitation. 

  • The foam made by rapidly stirring soap and water. 

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

  • To cover with lather. 

  • To beat or whip. 

sudation

noun
  • Perspiration; sweat (fluid). 

  • The process of perspiring. 

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