castoff vs disbelief

castoff

noun
  • Something that has been rejected or discarded; a reject. 

adj
  • discarded, rejected. 

disbelief

noun
  • The loss or abandonment of a belief; cessation of belief. 

  • Astonishment. 

  • Unpreparedness, unwillingness, or inability to believe that something is the case. 

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