I'll be a son of a gun vs yowzah

I'll be a son of a gun

intj

  • Expressing surprise or disbelief. 

yowzah

intj

  • Wow: an indication of surprise, excitement, or amazement. 

How often have the words I'll be a son of a gun and yowzah occurred in a corpus of books? (source: Google Ngram Viewer )