timeslot or time slot
Adapt Public Speaking Content for Any Time Slot - LinkedIn
Parents sometimes complain that schedules are not running on time, causing them to miss interviews, or be cut short. This is usually due to either parents or teachers electing to continue talking beyond their booked time slot.
Time slot - Definition, Meaning & Synonyms
Allow or require customers to specify a delivery time, time range or time slot. Delivery times can be set for all weekdays specifically per day.
Doodle event booking: Guidelines - linkedin.com
no deadline for deciding upon an alternative time slot (or set of alternative time slots).