Appointment field: Set limits for each time slot available

There is an option under the Advanced tab of the Appointment field properties where you can set the maximum attendee per time slot. However, if you are looking to set different availability limits for each time slot, I'm afraid that the Appointment field doesn't have that feature.

I will be forwarding your concern to our developers as a feature request on your behalf. We cannot guarantee that it will be implemented anytime soon, but rest assured that once we have an update we will let you know in this support ticket the soonest.