Block vs Serenity

Block

name

  • An English surname 

  • A Jewish surname 

  • A surname from German 

  • A surname. 

  • A surname from Dutch 

Serenity

name

  • A female given name from English in general use since the 1990s. 

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