ONCT operates "as needed". Finger Lakes usually operates to Canandaigua Tuesdays and Thursdays but ONCT does not necessarily receive cars every trip. If there are cars arriving, ONCT almost always will run the same day to deliver them to customers.
Most often FGLK drops the cars on their way to Canandaigua, late morning or so. Sometimes ONCT is there to meet them, sometimes they run later in the afternoon or evening.