colossus vs flying dragon

colossus

noun
  • Any creature or thing of gigantic size. 

  • Somebody or something very greatly admired and respected. 

  • A statue of gigantic size. The name was especially applied to certain famous statues in antiquity, as the Colossus of Nero in Rome and the Colossus of Rhodes, one of the Seven Wonders of the Ancient World. 

flying dragon

noun
  • Any lizard in the genus Draco. 

  • Draco volans, a gliding lizard endemic to Southeast Asia. 

  • Used other than figuratively or idiomatically: see flying, dragon. 

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