Not to be that guy, but late October is almost certainly not when you’d want to throw down heavy nitrogen. Nitrogen is for top growth. As your turf prepares for dormancy, you want it focused on growing down, not up. Phosphorus is for root growth. The “best” way to introduce phos is to mow consistently and don’t bag your clippings, but supplementing is a good idea if a soil test says you’re low. Conventional wisdom says that if you have a lot of fungus/mushrooms in your lawn, you have plenty of phos and shouldn’t add more.
Edit: timing varies by zone, but pre emergent and heavy nitrogen goes down in the spring once you’re approaching the last day you could experience a frost. You don’t seed in spring because there’s no way to get your turf seed to grow without also feeding weed seeds.
All of these tips are assuming you’re not in the transition zone (Brahma probably isn’t), and your turf is cool season and not warm season like Bermuda, centipede, zoysia, etc.