schedule options recommendations

i would like the ability to have a custom slider for the duration for the minutes and hours since they only come in 5-minute intervals, and some of my tasks are 7 minutes or 16 minutes or less than 5 minutes. so, it would be great to have full control over the duration for both task and their subtasks and the start and end times. it would also be nice to have more numbers of times for tasks since its only limited to 10 so like maybe instead of a slider it could be a text box and the user can input the number of times themselves, and the same goes for every x number of week, months, years, i think having a text box would be nice (maybe like instead of completely getting rid of the slider there could be at option at the at the beginning called custom and users can input the times via text box)

I also think it would be great if the timeline wasn’t limited to 6am to 11:30 pm and it have the full 24 hours (12am-11:59 pm).