I’ve heard the phrase 5 for 10 several times in a tv show in contexts where I would have used 5 out of 10 (of course different numbers work as well). I searched for it but found not a single page mentioning such a usage of the word “for”. So my question is, is that a common used expression and if so, does it have the exact same meaning as 5 out of 10?
The use of the word for here is usually in a sport or competition context. It refers there to the number of successes, out of a certain number of attempts:
The batter was 2 for 4 in the game.
(Above quote from Dictionary.com)
I can't think of any other contexts that I would hear it used, unless somebody was using it colloquially as though something were a sport:
John's been trying to chat up women all night. He's currently zero for five.