federalism vs realm

federalism

noun
  • A system of national government in which power is divided between a central authority and a number of regions with delimited self-governing authority. 

  • Covenantalism. 

  • The belief that such a system is superior to other forms of government. 

realm

noun
  • A territory or state, as ruled by a specific power, especially by a king. 

  • A taxonomic rank in the phylogeny of viruses, higher than kingdoms. 

  • A scope of operation in networking or security. 

  • An abstract sphere of influence, real or imagined. 

  • An otherworldly dimension or domain — magical, ethereal, or otherwise — usually ruled or created by a mystical character. 

  • The domain of a certain abstraction. 

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