castoff vs secondhand

castoff

adj
  • discarded, rejected. 

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

secondhand

adj
  • Indirect; from a secondary source; not firsthand. 

  • inhaled from the air near someone else smoking. 

  • Not new; previously owned and used by another. 

  • Dealing in such merchandise. 

adv
  • In a used or previously-owned condition. 

  • indirectly 

noun
  • Secondhand goods (especially clothes) collectively. 

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