by God vs oh em gee

by God

intj

  • An exclamation of surprise. 

adj

  • Genuine, actual. 

adv

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

  • Used as an intensifier. 

oh em gee

intj

  • An exclamation of excitement, surprise, amazement, or shock. 

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