City vs Metropolis

City

name
  • The City of London, the historic core of London where the Roman settlement of Londinium was established. 

  • Any of several other cities in metropolitan areas (such as San Francisco). 

  • The United Kingdom's financial industries, which are principally based in the City of London. 

  • The borough of Manhattan, the historic core of New York. 

  • Manchester City Football Club, an English football club. 

Metropolis

name
  • a classical city site in Anatolia (Turkey). 

  • A ghost town in Elko County, Nevada, United States. 

  • A city, the county seat of Massac County, Illinois, United States. 

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