eminent domain vs mastery

eminent domain

noun
  • In feudalism, the legal interest or rights of a lord or superior in an estate in land held in fee, as opposed to the vassal's or tenant's interest. 

  • The right of a government over the private property within its jurisdiction. Usually invoked to compel land owners to sell their property in preparation for a major construction project such as a freeway. 

mastery

noun
  • The position or authority of a master; dominion; command; supremacy; superiority. 

  • Superiority in war or competition; victory; triumph; preeminence. 

  • The act or process of mastering; the state of having mastered; expertise. 

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