intendant vs proconsul

intendant

noun
  • A governor in various specific contexts, including certain South American countries, and historically in the kingdoms of Spain, Portugal, and France, and in imperial China. 

  • The administrator of an opera house or theater. 

proconsul

noun
  • A magistrate who served as a consul and then as the governor of a province. 

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