Davidson County vs Rockbridge County

Davidson County

name
  • One of 100 counties in North Carolina, United States. County seat: Lexington. 

  • One of 95 counties in Tennessee, United States. County seat: Nashville. 

Rockbridge County

name
  • One of 95 counties in Virginia, United States. County seat: Lexington. 

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