Beryl vs Emerald

Beryl

name

  • A female given name from English derived from the gem beryl. 

Emerald

name

  • A female given name from English. 

  • The Rural Municipality of Emerald No. 277, a rural municipality in eastern Saskatchewan, Canada. 

  • A town in Queensland, Australia. 

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