Colt vs Emerald

Colt

name

  • A male given name transferred from the surname. 

  • A surname originating as an occupation. 

noun

  • A revolver (gun) (from Colt's Manufacturing Company), associated especially but not exclusively with the American Wild West. 

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 Colt and Emerald occurred in a corpus of books? (source: Google Ngram Viewer )