They call me and DH about 4-5 times a year LOL!!! We do communicate with each other on WhatsApp on maybe 3-4 days of the week though, and we see each other 2-3 times a month. They both live 15-17 miles away - one in a medium sized town and one in a large town. (We live in the arse end of nowhere in a tiny rural village!)
We used to speak on the telephone maybe twice - maybe three times a month pre WhatsApp, but quite honestly, it's easier/more convenient chatting on WhatsApp. (Had it 6-7 years, it was very handy during the Covid lockdowns!)
I did occasionally try and ring them (maybe 6-8 times a year,) but they never chuffing answered... So I stopped bothering, and I rarely do now... I just WhatApp them!!! I enjoy WhatsApp, as we send each other pictures. Of the cat, or pics a nice walk we've been on, or a meal we're out at, or a sunset, or a nice rainbow. Lots of stuff. They send nice stuff too. 
To the posters (whose DC who are mid 20s and younger,) who hardly hear from them 'unless they want something' and don't seem to be arsed about chatting/messaging back/even reading your messages. My 2 were the same. It was borderline slightly hurtful, and a bit annoying.
But when you realise it's not personal, and not about you, but more about them, and that stage in their life (being a bit wrapped up in their own world/their job/their mates/their boyfriend or girlfriend) you sort of stop getting bothered.
My 2 DC are in their early 30s now, (just over a year apart in age,) and are much more thoughtful and considerate now, and are much better at contact/getting back in touch than they were even 4-5 years ago. They respond to our messages within 1 to 4 hours around 80% of the time, compared to only about 15% of the time when they were in their mid 20s and younger.
Most of the time it was a day or two before we got a response.. Occasionally it was not at all! 😬