Test sequence how to check value between the time

I have requirement which I need to check data in 5s and tolerance is +/- 20 ms How to I write it in test sequence So that the check is in between 4.98s to 5.02s

Did some research in below page https://www.mathworks.com/help/sltest/ug/act-or-transition-using-temporal-and-event-operators.html

There is either test it after certain time .There is nothing like keep checking value for the time range Any suggestion will be helpful

Something like below for 4.98s to 5.02s: if value == True return true else return False