mantis vs praying mantid

mantis

noun
  • Any of various large insects of the order Mantodea that catch insects or other small animals with their powerful forelegs. 

  • A green colour, like that of many mantises. 

praying mantid

noun
  • praying mantis (insect) 

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