froth vs lather

froth

verb
  • To cover with froth. 

  • To spit, vent, or eject, as froth. 

  • (of a liquid) To bubble. 

  • To create froth in (a liquid). 

  • (literally) To spew saliva as froth; (figuratively) to rage, vent one's anger. 

noun
  • foam 

  • Thousands of African children die each day: why do the newspapers continue to discuss unnecessary showbiz froth? 

  • Highly speculative investment. 

  • The idle rich; 

  • unimportant or insubstantial talk, events, or actions; drivel 

lather

verb
  • To cover with lather. 

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

  • To beat or whip. 

noun
  • A state of agitation. 

  • The foam made by rapidly stirring soap and water. 

  • Foam from profuse sweating, as of a horse. 

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