Do have an interior, corner or pie shaped lot? Do you have a designer home?
With knowing nothing about your lot size or how green you want your lawn the average May water consumption is about 14,000 gallons. This is based upon over 40 irrigation years looked at of public records on water usage in TV.
Asking a 'irigation expert' is like asking how often should I change my oil. It is a meaningless opinion.
What I would do is install a Rachio irrigation controller less than 200.00 on Amazon. You punch in lawn type, soil type, slope. It calculates evaporation rate, checks with the weather service if it will rain, if it has rained, total irrigation for that zone including rain, checks if it is saturated. It changes the time based upon season. As a computer it doesn't have an opinion, just the facts to work with.
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