obscured vs unredeemed

obscured

adj
  • Made hidden, less visible, or dark. 

unredeemed

adj
  • Unspent; not used in a purchase, and thus still usable. 

  • Not redeemed; not granted redemption or salvation; unsaved. 

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