non-gradable vs several

non-gradable

noun
  • Any adjective that is not gradable. 

adj
  • That cannot be graded. 

  • (of an adjective) Describing a quality that cannot normally be varied because it is extreme (e.g. freezing), absolute (e.g. dead), or classification (e.g. nuclear). 

several

noun
  • Each particular taken singly; an item; a detail; an individual. 

adj
  • A number of different; various. 

  • Separable, capable of being treated separately. 

adv
  • By itself; severally. 

det
  • Consisting of a number more than two but not very many. 

How often have the words non-gradable and several occurred in a corpus of books? (source: Google Ngram Viewer )