hebetate vs rayless

hebetate

adj
  • obtuse; dull 

  • Having a dull or blunt and soft point 

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

rayless

adj
  • Lightless, gloomy. 

  • Lacking florets. 

  • Lacking rays. 

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