How can I set "Periodic meeting" to be held at any time?

Hello!

How can I set "Periodic meeting" to be held at any time?

When I use "Periodic Meeting", my screen says: You must select the time of the periodic meeting, the end date, and so on. But I need to hold a meeting at any time. How do I set "Hold a meeting at any time"?

When I used it some time ago, I was able to set "hold a meeting at any time", but recently I can't do so.