fence lizard vs hawk moth

fence lizard

noun
  • Any of several species of North American lizards in the genus Sceloporus, especially the eastern fence lizard (Sceloporus undulatus), the western fence lizard (Sceloporus occidentalis), and the southwestern fence lizard (Sceloporus cowlesii) 

hawk moth

noun
  • Any moth of the family Sphingidae. 

How often have the words fence lizard and hawk moth occurred in a corpus of books? (source: Google Ngram Viewer )