sponsorship vs supervision

sponsorship

noun
  • The state or practice of being a sponsor. 

  • The aid or support provided by a sponsor; backing or patronage. 

supervision

noun
  • The act or instance of supervising. 

  • A tutorial session for an individual student or a small group. 

  • Responsible oversight. 

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