Reccuring tasks with specific timeline

Hi there,

I have a dependent task that can start only if the other task is finished. So standard E–A dependence. See picture.

This next task has recurring steps that need to be done at different days in a special timeframe:
day 1
day 90 ±5 days
day 180 ± 5 days
day 380 ± 5 days

These days are not working days but standard days.

I struggle greatly to make a template for such projects including this. I tried to put in the times by using T+xD for constraints in the schedule area. Problem is that there the days that are used are working days, not real days.

How can one deal with the problems of working days vs. normal days in such a recurring task?