Spa vs Wilder

Spa

name
  • A town in the province of Liège, Belgium, famous for its springs. 

Wilder

name
  • A city in Kentucky, United States. 

  • A city in Idaho, United States. 

  • A census-designated place and village in Vermont, United States. 

  • A ghost town in California, United States. 

  • A city and village in Minnesota, United States. 

  • A surname. 

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