gibbous vs popping

gibbous

adj
  • Characterized by convexity; protuberant. 

  • Humpbacked. 

  • Having more than half (but not the whole) of its disc illuminated. 

popping

noun
  • A style of funk dance involving rapid contractions and relaxations of the muscles to switch between poses. 

  • The act or sound of something that pops. 

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