Time helps with gas only in respect to how well you adapt to a varied diet. Some fare better than others. If you have chronic pouchitis or small intestine bacterial overgrowth (SIBO), gas is a constant issue until the underlying problem is taken care of. Also, if you have IPS (similar to IBS), which is a functional disorder, gas issues are commonly a predominant symptom.
If it helps at all, most all intestinal gas is due to bacteria acting upon undigested food, and those are mostly carbs. So, if you can identify what you are eating in the 8-12 hours before the gas, you may be able to pin it down. Unfortunately, we often eat a carb heavy diet post op, because it seems easy to digest, thickening of the stool, and basically comforting. But, when you eat more carbs than your tempermental gut can handle, the bacteria have a field day, creating a virtual gas factory.
Many have found that reducing carbs (both simple and complex) and eating small frequent meals have helped a lot. Probiotics may help by restoring a more normal gut flora, but sometimes there is more gas initially, so it is easy to be discouraged by them.
Hope this helps. Understand that none of these tips may be useful for you, but are worth trying.
Jan