crocodilian vs lacertian

crocodilian

adj
  • of, pertaining to, or resembling crocodiles 

noun
  • Any reptile of the order Crocodilia; a crocodile, alligator, caiman or gavial. 

lacertian

adj
  • Pertaining to or resembling a lizard; lizard-like. 

noun
  • A member of the Lacerta. 

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