I think it's different for all babies, but Imogen fed initially every 2 hours ish until she was about a week old, then started feeding roughly every 3 hours. From 3 weeks ish old she went longer during the night - feeding between 3-5 hours although 5 hours is rare. It is usually 4 - 4 and half.
So depends what time you go to bed/get up and how much sleep you are used to. Lately i've been going to bed 12 ish feeding Imogen, then she wakes 4 -4.30 am for a feed, sleeps and then around 8.30 for her next, so in theory she only wakes once for a feed if you look at "sleep" time being 12 - 8. But other nights (like last night) she fed at 10 pm, 1.30 am (I stayed awake to feed her at this time cos she was awake from 10 - 1.30) then she slept til 4.30 am, then awake at 8.30 am. But she was unsettled last night so getting her back off to sleep took some patience (rocking, dummy, cuddles etc.) First time she went off with a cuddle, 2nd time in the end I left her in moses basket gurgling to herself and I dozed, prepared to wake if she became distresses, but she went off by herself til 8.30 am.
Also, babies feed for different durations - Imogen it's usually half hour but babies vary. are you planning to co-sleep or use moses basket/cot?
Hope this helps a bit.