Spacing feeds out can be tough, but the trick is to go slowly. Almost like you're stretching A times - you go slowly to prevent OT, and you want to do feeds the same way to give your lo time to get used to the new routine! So, for example, if you're currently feeding every 2h your feeding routine might look like:
7(wakeup), 9, 11, 1, 3, 5, 7(bedtime)
To start stretching, try:
7(wakeup), 9:10, 11:20, 1:30, 3:40, 5:50, 7(bedtime, really close to last feed but ok while you're stretching)
So instead of feeding every 2h, you're feeding every 2h10m, and you should do that for a couple of days. Then move to 2h20m between feeds for a couple of days.
7, 9:20, 11:40, 2, 4:20, 6:40(this you could make your bedtime feed, or top up before bed)
If he's tolerating the stretching well, you could space the feeds by 15m instead of 10m. The whole time you're doing this I would continue to offer solids in whatever breakfast, lunch, dinner pattern works for you.
I hope that example is helpful?
The nice thing at this age is though he might complain, it is easier to distract a 9mo old than a 3mo old! Try to have something *exciting* to distract him with at your old feed time if needed. An interesting toy, music, books, even a short video, just to occupy him and keep him distracted for that 10m. Even if you can change environment so that he's not thinking of nursing - take a quick walk around the block in the stroller, for example.
As for the frequent nursing at night, do you think that he might be teething or anything? The discomfort could be causing him to wake, and then he wants to feed to help himself settle. Have you tried pain meds to rule that out? If he's feeding a lot at night that could be contributing to your solid feeding troubles too... When we were doing night feeds (and we did one until 1yo) I used a feeding routine rule of thumb through the night:
- if he woke less than 3h (or 3.5h, or 4h, whatever our daytime routine was) since his last feed, I would try to settle another way (shh/pat, for example, though at your lo's age you might need to use a different technique)
- if he woke more than 3/3.5/4h since his last feed then I would feed and put back to bed
using that rule helped keep the night feeds at a manageable level for us.
Hope something in this rambling is helpful!