Clay Center vs Louisville

Clay Center

name
  • A village in Ottawa County, Ohio, United States, derived from Clay Township. 

  • A city, the county seat of Clay County, Kansas, United States. 

  • A minor city, the county seat of Clay County, Nebraska, United States. 

Louisville

name
  • A village, the county seat of Clay County, Illinois. 

  • A city, the county seat of Jefferson County, Georgia, United States. 

  • A city, the county seat of Jefferson County, Kentucky. 

  • A city, the county seat of Winston County, Mississippi. 

  • A town in Barbour County, Alabama. 

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