I was surprised that we dont get more than we do - we average one or two a year - it was worse than that in the home counties. Mind you the last one was 2 days, but to be fair that was cos of the hurricane that swept Scotland last year and in our case was 2 high power lines and one low power to sort out before they could reconnect us.
So you might be pleasantly surprised, we were going to get a generator for power cuts but havent felt the need to date. But we do have a wood stove that is also a range and that has a back boiler - so we can cook and keep a little bit warm and have a shower, - invaluable when our friends in the village with mains everything dont have anything.