That is odd. My parents were more hands-off when I went to college but I was 25 when I started, had already been through a Navy enlistment (GI Bill was paying for most of my college and I was working half-time), and I was still talking to them about weekly. It wouldn’t take two months of no-contact before my dad would’ve got in his truck, drove the 120 miles to the U, and banged on my door. My dad would’ve also noticed that something smelled dead when he got there and called 911. What the hell is wrong with people?
Same with me - and for me that was also an era when long-distance calls were not cheap. I would actually write letters, and call collect from the public phone once a week or so.