Mother in law tongues are tough plants and take a lot of abuse. That being said, like all plants water as needed. How often depends on the pot, the soil, and how fast it dries. I would wait until it is almost dry. If this plant is outside in fast draining soil on a windy day it could be watered almost every day. Inside in a ceramic pot without exposure to drying breezes or vents it can go a week or more.
https://plantcaretoday.com/how-to-care-f ... plant.html
Happy gardening in Hawaii. Gardens are where people grow.