Deke vs Rod

Deke

name

  • A male given name. 

noun

  • A member of the Delta Kappa Epsilon fraternity, founded at Yale College in 1844. 

Rod

name

  • A nickname for the male given names Rodney and Roderick. 

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