curator vs supervisor

curator

noun
  • A person who manages, administers or organizes a collection, either independently or employed by a museum, library, archive or zoo. 

  • A member of a curatorium, a board for electing university professors, etc. 

  • One appointed to act as guardian of the estate of a person not legally competent to manage it, or of an absentee; a trustee. 

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