For the past month, i have been belching over 100 times a day.. had an upper endoscopy and colonoscopy that noted no major issues. what is going on?

Lifestyle and diet: factors may contribute: swallowing air when eating/drinking or certain foods like cabbage, cauliflower, broccoli, beans, carbonated beverages/beer. But medical conditions cause this, too: hiatal/diaphragmatic hernia, reflux, ulcers/helicobacter pylori infection, food intolerance, pancreatic insufficiency. small bowel bacterial overgrowth.Eating/drinking tips: slow down, less talking, no straws