mantis vs sloth

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. 

sloth

noun
  • A herbivorous, arboreal South American mammal of the families Megalonychidae and Bradypodidae, noted for its slowness and inactivity. 

  • Laziness; slowness in the mindset; disinclination to action or labour. 

  • A collective term for a group of bears. 

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