Battery terminal corrosion prevention

It had occurred to me that there may have been some sort of spray/protectant on the OEM battery connections that was of course, removed when I installed the new battery.
Nothing looked obvious, and I didn't readily notice anything just now when I wire brushed them.

Seems odd, that it would have a corrosion issue in about 8K miles of daily driving.

I've never done anything to any other car I've ever owned.
My Dakota has 140,000 miles by me and 30K previous to me.
It gets driven maybe once or twice a month.
My Satellite gets driven once or twice a week during the spring and fall, but pretty much sits through the rainy season summer and the 2-6 weeks of "winter" we have.
Nothing done to either of those...ever.

I think I will get some type of protectant grease and a small brush.
Again, the design makes application difficult, even of a spray.
I'll do the best I can.