Huntingdon County vs Rockhill

Huntingdon County

name

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

Rockhill

name

  • A borough in Huntingdon County, Pennsylvania, United States. 

  • An unincorporated community in Collin County, Texas, United States. 

  • A surname. 

  • A hamlet in Clun parish, Shropshire, England (OS grid ref SO2879). 

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