Other people have already given more useful answers, but this thread is the first time I’ve learned that it’s “Thank God” rather than “Thank Goodness”. It was only an occasional presence in my life when I was a child, my grandmother would sometimes take me and my siblings there. Both her and my mother were faaaaiiiirly devout Catholics and raised us as such, and they called it “Thank Goodness It’s Friday” when they had cause to use the long version