by God vs sweet mother of God

by God

intj

  • An exclamation of surprise. 

adv

  • Used as an oath to emphasize the veracity of an associated statement. 

  • Used as an intensifier. 

adj

  • Genuine, actual. 

sweet mother of God

intj

  • Used to express alarm or anger. 

How often have the words by God and sweet mother of God occurred in a corpus of books? (source: Google Ngram Viewer )