I watered the heck out of ours, but were also talking 110F and single digit humidity, so I was out there every hour or so spraying the fresh shotcrete for the 5-6 days our builder said to do so. He installed a timed sprinkler which would run for 5min every hour, but the position on the edge resulted in areas that never got wet, so I took the hose to the whole thing just to be sure.
as others have said, you can't overwater it when it's curing. Good luck,