colubrine vs ophidian

colubrine

noun
  • Any snake of the subfamily Colubrinae 

adj
  • Snakelike. 

  • Relating to snakes. 

ophidian

noun
  • Any species of the suborder Serpentes; a snake or serpent. 

adj
  • Of or pertaining to the suborder Serpentes; of, related to, or characteristic of a snake or serpent. 

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