chief executive officer vs supervisor

chief executive officer

noun
  • The highest-ranking corporate officer or executive officer of a corporation, company, or agency, responsible for carrying out the policies of the board of directors on a day-to-day basis; CEO. 

supervisor

noun
  • A person with the official task of overseeing the work of a person or group, or of other operations and activities. 

  • In certain states, an elected member of the governing body for a county which is called the board of supervisors. 

  • A person who monitors someone to make sure they comply with rules or other requirements set for them. 

  • A process responsible for managing other processes. 

How often have the words chief executive officer and supervisor occurred in a corpus of books? (source: Google Ngram Viewer )