by God vs whoa

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. 

whoa

intj
  • An expression of surprise. 

  • Stop (especially when commanding a horse or imitative thereof); calm down; slow down. 

  • Used as a meaningless filler in song lyrics. 

verb
  • To attempt to slow (an animal) by crying "whoa". 

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