castoff vs exclusion

castoff

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

adj
  • discarded, rejected. 

exclusion

noun
  • The act of excluding or shutting out; removal from consideration or taking part. 

  • An item not covered by an insurance policy. 

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