Very seldom. We usually meet somewhere other than at our homes (which is what I take you to mean by “visit”: pay a call to, enjoy the hospitality of). We have lunch or dinner together at a restaurant, meet for tea, see a movie, go to the opera. And I visit with them then, in the sense of having a conversation, meaning that we exchange personal stories, opinions, and information.
I’m not sure how well known your thesis is. Do you just mean that it’s well known to you? I imagine that “too often” is subjective and changes with time. In my teens and college years I saw my best friends just about every day. Now once a month or so feels like a comfortable frequency.