chiefery vs overlordship

chiefery

noun
  • The status or role of a chief; chieftainship. 

  • A colonial administrative centre. 

  • The land ruled over by a chief; chieftainship. 

  • The form of government in which people are ruled by a chief. 

  • The leaders or chiefs of a people, collectively. 

  • An Irish head tax 

overlordship

noun
  • The position or quality of being an overlord. 

  • The realm of overlords. 

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