edentate vs knifelike

edentate

adj
  • Lacking teeth. 

  • Belonging to the Edentata. 

noun
  • Any mammal that has few or no teeth, but especially the anteaters, armadillos, and sloths of the former order Edentata. 

knifelike

adj
  • Resembling a knife or its effects. 

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