general practitioner vs healer

general practitioner

noun
  • A physician who provides primary care; treating acute and chronic illnesses and providing preventive care and health education; a family doctor. 

healer

noun
  • One who heals, especially through faith. 

  • Anything that heals; a medicine that heals some wound, injury, ailment, or disease. 

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