To properly water your plants, they should be irrigated with a drip irrigation system two and three times a week. This frequency will give your plants more than enough water without drowning or starving them.
It's important to remember that you need to increase your watering during summer and decrease it during winter. While watering them every two to three days is ideal for spring and autumn, it's far hotter during the summer and will require watering every one to two days.
Alternatively, it's far colder and rainier during the winter months, so it's best to scale back the watering to just once a week during those months. This will prevent your plants from being overwatered and having mould and diseases from where unabsorbed water has been left to sit.
Some irrigation controllers have in-built seasonal adjustment technology, which will compensate for weather and seasonal changes, but you may need to adjust your sprinklers for different seasons manually.