The majority of visitations from dead relatives occur at the time of dying or within the first week of death. There are also "crisis" visitations that can happen years and even decades later, in which someone having a baby, caught in a burning home, or feeling suicidal has a visitation and a shift in perspective that makes her realize that a loved one either wants to witness an important event or rescue her when she is in distress, a sort of guardian angel scenario.
One woman told me of her mother feeding the birds every day after retirement. Soon after retiring, her father died and her mother, a lonely widow, continued to religiously feed the birds. She ended up living another 30 years, her lawn perpetually hounded by hungry birds.
The day her mother passed in hospice care in the home, the birds on the lawn all at once flew off en masse. She got a shiver and realized she had never seen them do that ever before. She took it as a sign they were escorting her mother's soul.
I myself had an incident when my father passed. We came home from the hospital after he had a good day following his heart attack. We celebrated and then went to bed. I was lying on my bed in my room, the door locked, a habit I had gotten into as a teen who wanted privacy. I woke up when I felt someone tugging on my big toe. I squinted into the darkness to see the dark shadow of my father. He always tugged on my toe when he came home from a business trip because once his airplane nearly crashed and I got scared, but mother wouldn't let me stay up to meet him each time, so he would give me a sign he made it home. I figured the hospital had let him out and he was fine. I moved to sit up and the phone rang. I looked over at it and then back, and my father was gone. My sister pounded on the door that we had go to go the hospital NOW! I got dressed and we rushed over there and he was lying dead and peaceful in his hospital bed.
Many people I've known have had signs that their dead parents were there for the birth of the grandchild and they felt they were now guardians, even naming the children after them. One even had a son who at the age of 5 mentioned the man near the closet. They were worried about that comment until they asked more about him and the boy said, "He has a cane and white hair. He's very very tall and he wears a clock on his chest." It was the great-grandfather who died before the boy was born. He wore a pocketwatch, had a cane, was very tall and had pure white hair. The only problem was, her house had burned down as a child and all photos of her grandfather had burned and so her son had never seen his image.
So, do deceased family members visit us. It would appear, they do.
Here is my vlog about the subject -