hornworm vs sphingid

hornworm

noun
  • Some moths in the genus Manduca of the hawk moth family Sphingidae. 

  • A caterpillar of a hawk moth that has a hornlike tail process. 

sphingid

noun
  • Any of many hawk moths of the family Sphingidae 

adj
  • Of or pertaining to these moths. 

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