There is a big difference between the nappy requirements of a newborn and an older baby. A newborn constantly poos and wees, has more delicate skins. An older child who is close to being ready for potty training may well have a clean dry nappy for hours.
For the first 3 months I changed my children roughly every two hours. After that we used 4 to 6 nappies a day. We tried elimination communication with dd, but it all went turd shaped when she discovered mobility.
Elimination communication does work to a point, but it is a way of managing baby waste rather than toilet training. Certainly if you use cloth nappies then avoiding pooey nappies is brilliant.
My children were ready for toilet training around two and half years old. Some childrne are ready earlier and others are later.