lather vs spume

lather

noun
  • The foam made by rapidly stirring soap and water. 

  • A state of agitation. 

  • Foam from profuse sweating, as of a horse. 

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

  • To cover with lather. 

  • To beat or whip. 

spume

noun
  • Foam or froth of liquid, particularly that of seawater. 

verb
  • To froth. 

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