gliding vs hovering

gliding

noun
  • The action or motion of something that glides. 

  • The hobby, sport, or act of flying a glider. 

adj
  • Employing flexitime. 

  • That moves or changes with a glide. 

hovering

noun
  • The act of one who hovers. 

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