regent vs syndic

regent

noun
  • A member of a municipal or civic body of governors, especially in certain European cities. 

  • A member of governing board of a college or university; also a governor of the Smithsonian Institute in Washington DC. 

  • One who rules in place of the monarch, especially because the monarch is too young, absent, or disabled. 

  • The chief executive of a regency 

adj
  • Exercising vicarious authority. 

  • Ruling; governing; regnant. 

syndic

noun
  • A government official having different duties depending on the country; also, a magistrate, especially one of the Chief Magistrates of Geneva, Switzerland. 

  • An agent of a corporation, or of any body of people engaged in a business enterprise; specifically, in the University of Cambridge, a member of the senate appointed to carry out specific duties. 

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