monarchy vs sovereignship

monarchy

noun
  • A government in which sovereignty is embodied within a single, today usually hereditary head of state (whether as a figurehead or as a powerful ruler). 

  • The territory ruled over by a monarch; a kingdom. 

  • States based on a system of governance headed by a king or a queen. 

  • A form of government where sovereignty is embodied by a single ruler in a state and his high aristocracy representing their separate divided lands within the state and their low aristocracy representing their separate divided fiefs. 

sovereignship

noun
  • The role or status of sovereign. 

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