flying dragon vs wyrm

flying dragon

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

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

  • Any lizard in the genus Draco. 

wyrm

noun
  • A huge limbless and wingless dragon or dragon-like creature. 

  • A sea serpent. 

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