From the doc, it looks like FixedRate is what you need.
Fixed-rate execution is appropriate for recurring activities that are sensitive to absolute time, such as ringing a chime every hour on the hour, or running scheduled maintenance every day at a particular time.
The other schedules are "fixed delay" so if the tasks take a few minutes to run they'll delay 24 hrs from finish to next start and get later every day.
A good question is never answered. It is not a bolt to be tightened into place but a seed to be planted and to bear more seed toward the hope of greening the landscape of the idea. John Ciardi