marked vs non-gradable

marked

adj
  • Distinguished by a positive feature. 

  • Singled out; suspicious; treated with hostility; the object of vengeance. 

  • Having a secret mark on the back for cheating. 

  • Clearly evident; noticeable; conspicuous. 

  • In police livery, as opposed to unmarked. 

  • Having a visible or identifying mark. 

non-gradable

adj
  • (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). 

  • That cannot be graded. 

noun
  • Any adjective that is not gradable. 

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