aristocracy vs world power

aristocracy

noun
  • Government by such a class, or a state with such a government 

  • A class of people considered (not normally universally) superior to others 

  • The nobility, or the hereditary ruling class. 

world power

noun
  • A nation or state so powerful that it can influence world affairs. 

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