I would not be guided by time tbh, what I used to do after my lo had fed was hand express a drop and the creamier it was the more I'd figured he had. Bf times can vary loads depending on mood, tiredness etc.
That said it would be weird if your child didn't start to replace some of the nutrition from breastmilk with solids, just the idea is not to do it too much or too quickly.
Do you feed on demand or follow easy? What is your current routine?
