Barrack vs Roger

Barrack

name

  • A male given name. 

  • A surname. 

Roger

name

  • A male given name from the Germanic languages. 

  • A surname originating as a patronymic. 

  • Jolly Roger (pirate flag) 

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