leech vs phlebotomize

leech

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

  • To drain (resources) without giving back. 

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. 

phlebotomize

verb
  • To perform a phlebotomy; to open a vein to withdraw or let blood. 

  • To perform a phlebotomy on (a vein): to open (a vein) to withdraw or let blood. 

  • To perform a phlebotomy on (a person): to open a vein of (a person) to withdraw or let blood. 

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