Having rolled both may ankles a couple of times (the first time is the worst, gets a little easier after that) a week to 10 days is about what it takes to start going hard again. Of course each roll and each person is different. If it is simply a rolled ankle, might not be that serious. However, I think 4 days is real optimistic.A regular ankle sprain with treatment should be ok in 4 days. High ankle sprain can be weeks.
The whole world changed since then.HS players take much longer than college who still are slower to recover than pros.In college we had trainers of course, not like most HS teams. They had the kids moving that ankle after 24-48 hours depending on severity. In between it was in the ice bath. Great wraps and tape for next action. Treatments sure changed over my 40+ years of coaching.