It depends on the temperature in your house. I usually put the bowl with dough in my airing cupboard for the first prove and it takes approximately 1-1.5 hrs. If I left it on the kitchen counter it would be around 2-2.5 hours. Once I transfer focaccia dough onto baking tray I usually let it sit on the kitchen counter for about an hour just to puff up a bit, it doesn't need to double in size.