Ball vs Tombstone

Ball

name
  • A town in Rapides Parish, Louisiana, United States. 

  • A hamlet in Egloshayle parish, on the eastern outskirts of Wadebridge, Cornwall, England (OS grid ref SX0073). 

  • An English surname. 

Tombstone

name
  • A city in southeastern Arizona. 

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