procedure vs treatment

procedure

noun
  • A particular method for performing a task. 

  • The steps taken in an action or other legal proceeding. 

  • A series of small tasks or steps taken to accomplish an end. 

  • A subroutine or function coded to perform a specific task, but does not return a value. 

  • A surgical operation. 

  • The set of established forms or methods of an organized body for accomplishing a certain task or tasks. 

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 procedure and treatment occurred in a corpus of books? (source: Google Ngram Viewer )