Ball vs Sky

Ball

name
  • An English surname. 

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

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

Sky

name
  • A unisex given name from English. 

  • A surname. 

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