Kiev vs Ukraine

Kiev

name
  • A city, the administrative centre of Kyiv oblast, capital city of Ukraine. 

  • A former principality in Europe. The medieval principality centered on Kiev; the Kievan state or Kievan Rus. 

  • The government of Ukraine. 

  • A province, an oblast of Ukraine. Seat: Kyiv. 

Ukraine

name
  • A country in Eastern Europe, bordering on the north coast of the Black Sea; established as an independent country in 1991 upon the dissolution of the Soviet Union. Capital and largest city: Kyiv. 

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