I used to talk to my Mum a minimum of once a week. Usually for about an hour or until my ear got sore from holding the phone next to it.
I still find myself thinking 'oh Mum will be interested in this' or 'I must ask Mum about this' or similar at least a couple of times a week even though she's been gone for 8 years.
I miss my Mum so much. I wish I had spoken more often.