Watering new zoysia

We just had zoysia sod installed. The landscaper told us to water it for 10-15 minutes every other day. We've been doing that, but we wonder if that's enough. Anyone have advice on that?

I read Walter Reeves' advice on grass watering here (http://www.walterreeves.com/landscaping/drought-watering-lawns/) and it recommends watering grass much less frequently than what our landscaper told us. But since our lawn is new, I assume that advice doesn't apply and we should be watering our zoysia more, until it develops good roots. Am I right?
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