flapping vs waving

flapping

noun
  • An instance where one flaps. 

  • The situation where a resource, a network destination, etc., is advertised as being available and then unavailable (or available by different routes) in rapid succession. 

  • The unlicensed racing of horses or greyhounds. 

  • A phonological process found in many dialects of English, especially American English and Canadian English, by which intervocalic /t/ and /d/ surface as the alveolar flap /ɾ/ before an unstressed syllable, so that words such as "metal" and "medal" are pronounced similarly or identically. 

adj
  • that flaps or flap 

waving

noun
  • Repeated moving of arms or hands to signal. 

  • The motion of something that waves. 

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