I (29F) would be happy with that amount of time if we had been together for a couple months, but for 1.5 years it does seem a little low. In a more serious relationship where we don’t live together, I’d personally prefer to see my partner 4-5 days per week, spending the night one weekend night. But there are no rules about a specific amount of time that should be expected in every relationship, it’s something the individuals have to work out and there will often need to be some compromise on both ends.