It might be different depending on how old your baby is. I nursed my son until he was a year old and then started the process of weaning. He did eat solids before then, but it wasn’t as his main source of food until I started weaning. I upped his solids, created an eating schedule based on eating solids (so he ate solids and then would nurse to fill up, rather than the other way around which was what I was doing before), and then slowly cut out nursing feedings. So every few days or a week I’d cut another nursing session. It made it really easy on me so I didn’t have any problems with engorging. My supply just went down with each cut until he and I were both done. All told I think it took me a couple months.