It's very location dependent fwiw.

In the UK, I think I can remember 3 power outages my entire life. One when there was significant flooding in my hometown as a child, which lasted around a day, once at university for a few hours (local substation failed) and recently 30 minutes overnight while they were upgrading something (with a lot of notice). I may be undercounting/misremembering but I don't think its far off.

I think the main difference is the UK in all but mostly rural areas has all the power lines underground. This is very different in eg North America where you can go a few blocks out of downtown areas and it is all overhead delivery.