Time in hh:mm on a field in form

Hello,

I am making a form that contains a field in which hours and minutes are entered. In this field I want to enter weekly hours, therefore a number of hours greater than 24. But, I want to respect that the minutes do not exceed 60. For example, 60 hours and a half, it should be 60:30 instead of 60:50.

I can't find any dataype that meets the requirement, the closest one is TimeHour24 but it doesn't support values greater than 24. I have thought about using strings but I don't think it is the best idea to make calculations.

Any advice?

Thanks.