How long does it take you to nurse?

Helena

My LO was a late preterm so he sucked at sucking and we triple fed him to make sure he had enough milk. Now that he's 9 weeks old, he's much better at sucking but still takes a long time. Sometimes after a whole hour of nursing, he still seems hungry. How long does it take your LO to nurse and how old are they? What can I do to help him drink faster?