Core vs Iris

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. 

Iris

name
  • A female given name from Ancient Greek; a flower name used since the end of the 19th century. 

  • A messenger of the gods, and goddess of rainbows. 

  • 7 Iris, a main belt asteroid. 

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