primacy vs superiority

primacy

noun
  • The state or condition of being prime or first, as in time, place, rank, etc. 

  • the office or dignity of an archbishop 

  • The office, rank, or character of a primate, it being the chief ecclesiastical station or dignity in a national church 

superiority

noun
  • The state of being superior. 

  • The right which the superior enjoys in the land held by the vassal. 

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