Massac County vs Metropolis

Massac County

name

  • One of 102 counties in Illinois, United States. County seat: Metropolis. 

Metropolis

name

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

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

  • a classical city site in Anatolia (Turkey). 

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