Circle vs Confederation

Circle

name
  • A census-designated place in Yukon-Koyukuk Census Area, Alaska, United States. Erroneously thought to be on the Arctic Circle, which is 50 miles further north. 

  • A town, the county seat of McCone County, Montana, United States. Named after a cattle brand in the form of a circle. 

  • the Circle line of the London Underground, originally the Inner Circle. 

  • A surname from German. 

Confederation

name
  • In Newfoundland, the political union of Newfoundland with Canada. 

  • In Canada, the federal union of provinces and territories which formed Canada, beginning with New Brunswick, Nova Scotia, Ontario, and Quebec, and later including all the others. 

  • In Canada, the date of Confederation; 1 July 1867. 

  • In Newfoundland, the date of Confederation; 31 March 1949. 

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