United Kingdom vs United Kingdom of Great Britain

United Kingdom

name

  • The Kingdom of Great Britain (1707–1801). 

  • A kingdom and sovereign state in Western Europe comprising the four countries of England, Scotland and Wales in the island of Great Britain, and Northern Ireland in the island of Ireland. Since 1922. 

  • Kingdom consisting of several constituencies, actual, historical, or hypothetical. 

  • The United Kingdom of Great Britain and Ireland (1801–1922). 

United Kingdom of Great Britain

name

  • the Kingdom of Great Britain 

  • United Kingdom 

How often have the words United Kingdom and United Kingdom of Great Britain occurred in a corpus of books? (source: Google Ngram Viewer )