irreclaimable vs unsalvageable

irreclaimable

adj
  • Incapable of being reclaimed; not reclaimable. 

  • Unredeemable. 

unsalvageable

adj
  • That cannot be salvaged; not salvageable 

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