healing vs treatment

healing

noun
  • The psychological process of dealing with a problem or problems. 

  • The process where the cells in the body regenerate and repair themselves. 

  • An act of healing, as by a faith healer. 

treatment

noun
  • The process or manner of treating someone or something. 

  • Medical care for an illness or injury. 

  • A brief, third-person, present-tense summary of a proposed film. 

  • A treatise; a formal written description or characterization of a subject. 

  • The use of a substance or process to preserve or give particular properties to something. 

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