Clay vs Rod

Clay

name
  • A diminutive of the male given name Clayton. 

  • A surname originating as an occupation. 

  • A census-designated place in Sacramento County, California, United States. 

  • A town, the county seat of Clay County, West Virginia, United States. 

  • A male given name transferred from the surname. 

  • A number of townships in the United States, listed under Clay Township. 

Rod

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

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