irrecoverable vs irremediable

irrecoverable

adj
  • That cannot be recovered from or made good; irremediable. 

  • Not recoverable; incapable of being recovered. 

irremediable

adj
  • Unable to be remedied, cured, corrected or repaired; irreparable, incurable. 

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