anguinine vs crocodilian

anguinine

adj

Of, pertaining to, or characteristic of serpents.

crocodilian

adj

of, pertaining to, or resembling crocodiles

noun

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

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