I find she roughly has feeds within half hour of same time. Generally wakes 12:30am-1:00am at night then in the morning anywhere between 6-7:30 so then after that its 10, 1, 4, 7 or just after.

Sleep times vary, bedtime is always the same between 7-7:30pm but during the day it varies, usually she sleeps not long after feeds, depends on how long her previous nap was for, lately been 30-40mins.

When I had DD1 a friend gave me a spreadsheet she'd made on the computer to fill in feed, sleep, awake and unsettled times and you will actually find after a few days of doing it there is a rough pattern there. Maybe try writing down and see what pattern you have going and try work a little routine into her already existing pattern.