Core vs Metropolis

Core

name
  • A female given name from Ancient Greek 

  • The birth name of Persephone/Proserpina, the queen of the Underworld/Hades, and goddess of the seasons and of vegetation. She is the daughter of Zeus and Demeter, and the wife of Hades. 

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