hebetate vs sheenless

hebetate

adj
  • Having a dull or blunt and soft point 

  • obtuse; dull 

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

sheenless

adj
  • Without a sheen; dull. 

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