castoff vs discouragement

castoff

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

adj
  • discarded, rejected. 

discouragement

noun
  • Anything that discourages. 

  • The act of discouraging. 

  • The loss of confidence or enthusiasm. 

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