hebetate vs rasp

hebetate

verb
  • To render obtuse; to dull; to blunt. 

adj
  • obtuse; dull 

  • Having a dull or blunt and soft point 

rasp

verb
  • To grate harshly upon; to offend by coarse or rough treatment or language. 

  • To use a rasp. 

  • To say in a raspy voice. 

  • To make a noise similar to the one a rasp makes in use; to utter rasps. 

  • To work something with a rasp. 

noun
  • A coarse file, on which the cutting prominences are distinct points raised by the oblique stroke of a sharp punch, instead of lines raised by a chisel, as on the true file. 

  • The sound made by this tool when used, or any similar sound. 

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