debtor vs indebtedness

debtor

noun
  • One who owes another anything, or is under obligation, arising from express agreement, implication of law, or principles of natural justice, to pay money or to fulfill some other obligation; in bankruptcy or similar proceedings, the person who is the subject of the proceeding. 

  • A person or firm that owes money; one in debt; one who owes a debt. 

indebtedness

noun
  • The state of owing something or being under obligation to someone. 

  • All debts totalled. 

  • The amount owed. 

  • State of owing money; being in debt. 

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