you just can't say whether 0/0 is Infinity or itself 0. Because 0/0 is a number which does not even exist, even being a positive integer.
Can you chill pastry for too long? The good news is that as long as the dough is left in the fridge it should keep for 24 hours. When you want to roll out the dough let it sit out of the fridge for about 30 minutes to warm up slightly, fridge-cold dough tends to crack easily when you start rolling it out.
The fluids in your hands contain salt so the water will prevent “frost bite” or freezing. A non-freezing cold injury is unlikely in 5 minutes…. 10 minutes or longer, wouldn't recommend it.