hegemony vs rulership

hegemony

noun
  • Domination, influence, or authority over another, especially by one political group over a society or by one nation over others. 

  • Dominance of one social group over another, such that the ruling group or hegemon acquires some degree of consent from the subordinate, as opposed to dominance purely by force. 

rulership

noun
  • A position in which one rules or has sovereignty over others. 

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