Ace vs Ken

Ace

name
  • A male given name. 

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

Ken

name
  • A diminutive of the male given name Kenneth. 

  • Kensington in London (in combinations, e.g. South Ken, High Street Ken). 

  • A surname. 

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