1 Task to have Groups of Repeat (Recurring) Cycles

Sometimes tasks are monthly recurring in nature. But in order to complete 1 monthly recurring task it has to be done 2 to 3 times in a month.

For example

1. A monthly task recur on 15th of every month.

2. But in order to complete the task on 15th of the month I need to plan the work on 05th (1 Hour), 07th (1.5 Hours) and 10th (2.5 Hours) of the month so that finally on 15th (3 Hours)

3. So I took total 8 hours spread in 4 days to finally complete it on 15th

4. This similar cycle will continue next month but may be different dates but deadline as 15th. So next month planning will be 04th (2 Hours), 08th (3 Hours), 11th (2.5 Hours), 12th (1 Hour) and finally on 15th (4 Hours)

5. So next recurring month took 12.5 Hours spread in 5 days to finally complete it on 15th

Right now I am duplicating the task to manage above example.

I would request if such Group Recurring Cycles can be created for better planning and not to duplicate the tasks.