Levi did that too. He was amazing until 4 months and then I SUFFERED through the next few months. At 7 months I decided I was through with getting up at night. I was about to lose it!
All it took was a few minutes of crying for two nights and he was sleeping through. (And it wasn't "emotional" crying it was "protest" crying, if you know what I mean.) I think it was about 20 minutes the first night and 10 the second... but truthfully I can't even remember the details (from only six weeks ago!). Anyway, it was so easy that I wished I had done it sooner!! (Though maybe that's also because he was well and truly ready.)
The reason I hadn't done it sooner was that my doc had said breastfed babies sometimes still need a feed at night until they are a year so I was still feeding him... going on her advice. (Even though he used to sleep through...)
Then I got exhausted and crazy and decided to go with my gut and wean that feed. I was so glad when I did.
But 2-3 times sounds like a lot. Can you cut her back to 1 night feed? And then when she's established on solids cut out the last one? That's what I'd do. :)
Btw, I should also say that I had sleep-trained Levi when he was 2-3 months so he already knew how to go to sleep on his own (I didn't feed-to-sleep or anything like that). So he did already have that skill down... just had to break him of the habit of the actual waking up. Taking away the feed also took away his incentive to wake up I guess!!
What do you think??