Brownie vs Greeny

Brownie

name

  • A nickname of the surname Brown. 

noun

  • A junior Girl Scout. 

  • A junior Girl Guide. 

Greeny

name

  • A nickname of the surname Green. 

  • A nickname for someone (e.g., a fictional character or a creature of myth) who is green. 

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