governance vs quindecimvirate

governance

noun
  • The group of people who make up an administrative body. 

  • The process, or the power, of governing; government or administration. 

  • Accountability for consistent, cohesive policies, processes and decision rights. 

  • The state of being governed. 

  • The specific system by which a political system is ruled. 

quindecimvirate

noun
  • A group of fifteen people, especially (politics) a council of fifteen men sharing office or rule, particularly such groups of magistrates in ancient Rome. 

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