lacertian vs lacertilian

lacertian

adj

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

noun

  • A member of the Lacerta. 

lacertilian

adj

  • Lizardlike. 

  • Relating to the reptilian suborder Lacertilia. 

noun

  • A reptile of suborder Lacertilia. 

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