Sitting without support - how long?

When your baby sits without support, how long can they sit up? My girl started sitting without support around 4,5 months - but now at 5 months, she can still only sit for about 1 min max before she topples to either side or she bends forward to eat her feet or she decides bugger sitting, I want to chill now and lies down. 😂 If I give her my hand, she will pull herself back up if she wants to though... So for how long does your baby sit in 1 go before a topple or needs a helping hand? X