caretaker vs supervisor

caretaker

noun
  • Someone who takes care of a place or thing; someone looking after a place, or responsible for keeping it in good repair. 

  • Someone who takes care of a person; a parent, carer or other guardian. 

adj
  • Temporary, on a short term basis. 

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 caretaker and supervisor occurred in a corpus of books? (source: Google Ngram Viewer )