Huntingdon County vs Rockhill Furnace

Huntingdon County

name

  • One of 67 counties in Pennsylvania, United States. County seat: Huntingdon. 

Rockhill Furnace

name

  • Synonym of Rockhill, Huntingdon County, Pennsylvania. 

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