castoff vs declination

castoff

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

adj
  • discarded, rejected. 

declination

noun
  • A refusal. 

  • At a given point, the angle between magnetic north and true north. 

  • At a given point, the angle between the line connecting this point with the geographical center of the earth and the equatorial plane. 

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