Alleghany County vs St. Tammany Parish

Alleghany County

name

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

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

St. Tammany Parish

name

  • One of 64 parishes in Louisiana, United States, the equivalent of a county in other US states.. Parish seat: Covington. 

How often have the words Alleghany County and St. Tammany Parish occurred in a corpus of books? (source: Google Ngram Viewer )