drug vs treatment

drug

noun
  • A substance used to treat an illness, relieve a symptom, or modify a chemical process in the body for a specific purpose. 

  • Anything, such as a substance, emotion, or action, to which one is addicted. 

  • A psychoactive substance, especially one which is illegal and addictive, ingested for recreational use, such as cocaine. 

  • Any commodity that lies on hand, or is not salable; an article of slow sale, or in no demand. 

verb
  • To administer intoxicating drugs to, generally without the recipient's knowledge or consent. 

  • To add intoxicating drugs to with the intention of drugging someone. 

  • To prescribe or administer drugs or medicines. 

treatment

noun
  • The use of a substance or process to preserve or give particular properties to 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 process or manner of treating someone or something. 

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