Ace vs Brownie

Ace

name

  • A male given name. 

  • A common nickname suggesting skill, particularly among airplane pilots. 

Brownie

name

  • A nickname of the surname Brown. 

noun

  • A junior Girl Scout. 

  • A junior Girl Guide. 

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