healer vs medicine man

healer

noun
  • One who heals, especially through faith. 

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

medicine man

noun
  • A traditional healer among other indigenous peoples. 

  • A Native American shamanistic healer. 

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