empire vs hegemony

empire

noun
  • An expansive and powerful enterprise under the control of one person or group. 

  • A political unit, typically having an extensive territory or comprising a number of territories or nations (especially one comprising one or more kingdoms) and ruled by a single supreme authority. 

  • A political unit ruled by an emperor or empress. 

  • The group of states or other territories that owe allegiance to an imperial power (foreign to them), when distinguished from the native territory of that power; imperial possessions. 

  • control, dominion, sway. 

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. 

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