flap vs lather

flap

noun
  • A controversy, scandal, stir, or upset. 

  • A side fin of a ray. 

  • A consonant sound made by a single muscle contraction, such as the sound /ɾ/ in the standard American English pronunciation of body. 

  • The motion of anything broad and loose, or a sound or stroke made with it. 

  • Anything broad and flexible that hangs loose, or that is attached by one side or end and is easily moved. 

  • A piece of tissue incompletely detached from the body, as an intermediate stage of plastic surgery. 

  • A hinged leaf. 

  • The labia, the vulva. 

  • A hinged surface on the trailing edge of the wings of an aeroplane, used to increase lift and drag. 

verb
  • To move loosely back and forth. 

  • To move (something broad and loose) up and down. 

  • Of a resource or network destination: to be advertised as being available and then unavailable (or available by different routes) in rapid succession. 

lather

noun
  • A state of agitation. 

  • The foam made by rapidly stirring soap and water. 

  • 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 flap and lather occurred in a corpus of books? (source: Google Ngram Viewer )