debtor vs leech

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. 

leech

noun
  • A person who derives profit from others in a parasitic fashion. 

  • The aft edge of a triangular sail. 

  • An aquatic blood-sucking annelid of class Hirudinea, especially Hirudo medicinalis. 

  • A healer. 

  • The vertical edge of a square sail. 

verb
  • To drain (resources) without giving back. 

  • To apply a leech medicinally, so that it sucks blood from the patient. 

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