crocodilian vs reptiliform

crocodilian

adj
  • of, pertaining to, or resembling crocodiles 

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

reptiliform

adj
  • Resembling or relating to reptiles. 

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