Here's a sample G-tube schedule for us, although it keeps evolving as she grows:
9:00 am Feed by bottle
10:00 am G-tube 85 ml at 60 ml/hr
12:30-1:30 pm Feed on demand by bottle
2:00 pm G-tube 85 ml at 60 ml/hr
5:00-6:00 pm Feed on demand by bottle
7:00 pm G-tube 85 ml at 60 ml/hr
9:30-10:30 pm Feed on demand by bottle
12 am G-tube 70 ml at 60 ml/hr
2 am-8 am Continuous feed of 150 ml at 25 ml/hr
If she drinks more by bottle, then we reduce the amount by G-tube. The continuous feed, when it was suggested to us, was a life-changer. We now get about 5 hours of straight sleep at night if she doesn't wake up screaming because of gas. More about gas later.
I hope this helps someone, because I couldn't find a schedule with volumes or rates anywhere, and it would have helped me a lot to see an example written out, rather than just being told to feed her every few hours.
The picture shows her using an Avent bottle because that's what I started with, but once we found out she was aspirating and we had to use thickened formula, we switched to a standard Dr. brown bottle with a Level 3 nipple.