democracy vs principality

democracy

noun
  • A state with a democratic system of government. 

  • Rule by the people, especially as a form of government; either directly or through elected representatives (representative democracy). 

  • A government under the direct or representative rule of the people of its jurisdiction. 

  • Belief in political freedom and equality; the "spirit of democracy". 

principality

noun
  • A region or sovereign nation headed by a prince or princess. 

  • A spiritual being, specifically in Christian angelology, the fifth level of angels, ranked above powers and below dominions. 

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