hegemony vs suzerainty

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. 

suzerainty

noun
  • A relation between states in which a subservient nation has its own government, but is unable to take international action independent of the superior state; a similar relationship between other entities. 

  • The status or power of a suzerain. 

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