castoff vs go-by

castoff

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

adj
  • discarded, rejected. 

go-by

noun
  • The deliberate ignoring or disregard of someone or something. 

  • In coursing, the act of passing by or ahead in motion. 

  • Escape by artifice; evasion. 

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