fluttering vs twerk

fluttering

noun
  • Rapid back-and-forth waving or oscillation. 

twerk

noun
  • A fitful movement similar to a twitch or jerk. 

  • A dance involving sexual movements of the hips and buttocks. 

  • An abrupt call, such as that made by the California quail. 

verb
  • To twitch or jerk. 

  • To move the body in a sexually suggestive twisting or gyrating fashion, especially as a dance. 

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