debtor vs delinquent

debtor

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

  • 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. 

delinquent

noun
  • A person who has not paid their debts. 

  • A royalist in the First English Civil War (1642-1646). 

  • One who disobeys or breaks rules or laws, or who acts against another's wishes. 

adj
  • Failing in or neglectful of a duty or obligation; guilty of a misdeed or offense 

  • Late or failing to pay a debt or other financial obligation, like a mortgage or loan. 

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