I actually visit my mother less now that she is in AL and has friends and activities and all the assistance she needs. When I was helping her "age in place" in her old house, many visits were necessary for purely practical reasons. We don't socialize well ... sadly she is one of "those" parents that SJ mentioned. And now my visits tend to be for mostly practical reasons as well -- to take her to the doctor, bring her new clothes to try on, keep her relatively calm and make her feel loved. Well, she actually is loved, just not 'liked' very dang much, let me tell you.
Sierraseven brought up a pertinent point -- I do think proximity is a deciding factor. I live hours away from my mother and visits to her are an all-day affair, sometimes two days. And I can't get away from work and my household for days at a time very often. When she was first in AL, I visited monthly. Now it's more like every two months. And with my mother, six or seven visits a year is PLENTY.
Now if things were different ... hmmmm. If my mother lived nearby and had always been a loving presence in my life and a person who make me feel good about myself as opposed to on a freight train to hell ... let me imagine. (It's hard.) Given my household responsibilities and work schedule, I imagine that I would visit every week, probably twice a week when work was slow. I admit freely that I don't know much about close families, but to me visiting every single day is something you do when someone is dying. And although our parents are nearing the end of their lives, I don't think a death watch that goes on for years is pleasant or healthy for anyone, the watchers or the watchee. If it were me, I would prefer to live out my life, wherever I was, as "normally" as possible. And I would want my loved ones to live their lives normally also. But like I admitted, I know squat about how regular families function.