castoff vs repulsion

castoff

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

adj
  • discarded, rejected. 

repulsion

noun
  • An extreme dislike of something, or hostility to something. 

  • The repulsive force acting between bodies of the same electric charge or magnetic polarity. 

  • The act of repelling or the condition of being repelled. 

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