AB Unlimited Seatime

I held an AB Unlimited a few years ago. It’s expired. And it’s been expired for 4 years, so it seems that I would have to apply for just an original MMC and retake my classes for my AB.
My question, is about my previous Seatime. Once, I took the required courses for AB, would my previous Seatime count towards the Unlimited? Or would I really have to start all over again?