My Danish electricity supplier lets me download my smart meter records since 2022.

It's by hour, and the highest times are probably when I was cooking with both the oven and the hob, and perhaps had the washing machine running too. The highest hour used 2.9kWh.

Plenty of cheap (e.g. rental) homes in the UK have crappy electric shows, which are usually rated at 6-8kW — but rarely used for a whole hour.