Hi Doodle!
Yep... Bettas can be quite the little piggies!
Just like people, it is most healthy for a Betta to eat smaller, more frequent meals. Especially when it is pellets or other fibrous foods, they have a tendency to bloat. In the case of bloat, you can feed 1 blanched pea (some cut in half), or Daphnia is a natural aid in relieving bloat too.
Yes, it would be better to feed your fish twice a day, and give him 2 - 3 pellets each feeding. 3 feedings is the best of all. But it entirely depends on what you can manage to do consistently. It is still ok to feed him once a day, about 3 pellets, but I know how those Betta eyeballs can be... they oggle you so hard with those shiny eyes, their eyes look huge!!
I feed an amount comparable to 2 pellets 3 times a day, but I feed live and freeze dried foods. Most all my fish are either still growing or being conditioned for spawning. Pellets are OK though for a pet Betta.
It is generally recommended to routinely fast your Betta once or twice a week, to prevent bloat from happening. Since I can't stand those hungry eyes, my version of the "fast" is to give them 2 tiny feedings of freeze dried Daphnia hydrated in Vita Chem vitamins.
Feel free to PM me if you ever have need of more info or anything
And CONGRATULATIONS on 4 years!!