hebetate vs lackluster

hebetate

adj
  • Having a dull or blunt and soft point 

  • obtuse; dull 

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

lackluster

adj
  • Having no shine or lustre; dull. 

  • Not exceptional; not worthy of special merit, attention, or interest; having no vitality. 

  • Lacking brilliance or intelligence. 

noun
  • Lack of brightness or points of interest. 

  • A person or thing of no particular brilliance or intelligence. 

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