detergent vs lather

detergent

noun
  • Any non-soap cleaning agent, especially a synthetic surfactant. 

adj
  • Synonym of cleansing. 

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. 

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