Judas Priest vs son of a gun

Judas Priest

intj
  • A euphemistic or innocuous term in place of the idiom Jesus Christ! commonly used in anger or surprise. 

son of a gun

intj
  • Used to express anger, contempt, disgust, astonishment, disappointment, etc. 

noun
  • son of a bitch 

  • Used encouragingly or to compliment 

How often have the words Judas Priest and son of a gun occurred in a corpus of books? (source: Google Ngram Viewer )