Burgh vs Metropolis

Burgh

name
  • A topographical surname from Anglo-Norman for someone who lived in a fortified place. 

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 Burgh and Metropolis occurred in a corpus of books? (source: Google Ngram Viewer )