lacertian vs saurian

lacertian

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

noun
  • A member of the Lacerta. 

saurian

adj
  • Synonym of lizardlike or reptilian. 

  • Of or related to the members of the suborder Sauria. 

noun
  • A reptile of the suborder Sauria. 

  • Any large reptilian animal, including crocodiles and reptilian aliens. 

  • A lizardlike person. 

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