As another person mentioned, you need to go to the main road to catch the bus. Best spot is at the fork in the road down near Enold's. There is no schedule, per se - the busses basically run their routes endlessly throughout the day but, with traffic and construction, they can sometimes come by ever 30-45 minutes or it could be 1-2 hours. You basically have to just wait. The earlier in the morning, the better, as they haven't had the "chance" to encounter too many delays by that point. Look for vans that have cardboard signs inside the windshield with the destination printed on them. Very affordable but can often be very crowded and unreliable. It's worth trying once, if only to experience a local thing!