Set the campaign preferences (dates, spots, hour ranges and breaks), and AdMaster engine will pick the hours and breaks to match your settings. The algorithm is very powerful, and it includes rescheduling already selected hours and breaks (on the ongoing campaigns) without you being asked about it, to make the room for the new campaigns, and to make the better schedule for the ongoing campaigns.
The setup can be simple, e.g. pick one of three available spots, and play one of them in a randomly picked hour between 7AM and 7PM for 90 days.
Or you can go deeper into details. This week, pick the spot A, and play it once between 7AM and 9AM, then play it two times between 2PM and 6PM, then play it once more between 9PM and 11PM. In a gap between 9AM and 2PM, play the spot B two times. Next week, replace the spots A & B with the new spots (C & D). In the third week, bring back the spot A, and replace the B spot with the E spot, have A spot scheduled within the first break in an hour, and do this for two weeks, skipping the Sundays when the client’s store is closed.
For this setup, you shouldn’t spend more than 3 minutes. All the hours and break calculations are performed and maintained automatically.