f vs son of a gun

f

noun
  • fuck 

  • Folio, paper and book size (10"-12.5" x 15"-20") 

symbol
  • The name of the fourth tone of the model scale, or scale of C. F sharp (F♯) is a tone intermediate between F and G. 

character
  • The sixth letter of the English alphabet, called ef and written in the Latin script. 

son of a gun

noun
  • son of a bitch 

  • Used encouragingly or to compliment 

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

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