Does whitening treatment also require a schedule?

I'm curious about teeth whitening. The "Ask This Week" event is really great.

The main ingredient in teeth whitening is 'hydrogen peroxide'.

It is said to be a component that has been used as an oral disinfectant for a long time.

Using high concentrations of hydrogen peroxide may cause side effects.
The main side effects of teeth whitening are tooth sensitivity and gum swelling.

I can't easily try it because of this side effect.

Because there are occasional sensations of tooth sensitivity while brushing, I hesitate a bit to whiten.

What is the usual interval after one session?

Should I redo it if I see it with the naked eye and think it's yellow?

Or is it like scaling, scheduled every six months at a fixed interval?