Calvary vs Holy Cross

Calvary

name
  • The hill outside Jerusalem which is traditionally held to be the location of the crucifixion of Jesus. 

Holy Cross

name
  • the historical cross on which Christ died 

  • A city in Alaska. 

  • A city in Iowa. 

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