My daughter ensures I check in her every day via text messages, and I’m 64.
My brother and his family moved in with Mom when she turned 90. (Thank God for that, and his angel wife!)
Still, my sister and I continued to check on Mom on alternate days just for extra assurance. That also served to check on my brother’s family. I can’t even imagine going weeks without knowing.
(Of course, his children must be pretty old, too, and perhaps they weren’t able.)