DH talks to his mom daily, she is 81 and lives next door.
I talk to my parents once or twice on the phone for a very brief time (I am not a phone talker and my folks aren't offended), but we spend almost every Sunday afternoon at their house and lately they have been keeping DS one morning a week while I go to school. In the fall, DS will ride the bus to their house twice a week and we will still go on Sunday. So, I guess a lot, just not on the phone. LOL
My DSis lives a couple of hours away and they usually come down every other Sunday. Sis calls more frequently than I do. She is definitely a phone talker! LOL She used to call daily, now more like every 2 or 3 days.