dominion vs overlordship

dominion

noun
  • Power or the use of power; sovereignty over something; stewardship, supremacy. 

  • A kingdom, nation, or other sphere of influence; governed territory. 

  • predominance; ascendancy 

  • kingdom 

  • An order of angel in Christian angelology, ranked above virtues and below thrones. 

overlordship

noun
  • The position or quality of being an overlord. 

  • The realm of overlords. 

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