elderdom vs empire

elderdom

noun
  • Authority; dominion. 

  • Preeminence; superiority. 

  • The role or influence of an elder or elders. 

  • The authority, rule, or office of an elder. 

  • The state of being an elder, or of being older; elderhood. 

empire

noun
  • control, dominion, sway. 

  • 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. 

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

  • 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. 

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