You are welcome to call anytime.

I am, thankfully, past the intern stage of my writing career. I am allowed the flexibility to handle personal matters and phone calls during the week. Getting phone calls while I'm doing projects I own are far less traumatic emotionally and professionally than finishing the projects of others, as was the case when I was an intern.

In contrast, I am of the opinion that, today, you aren't as available for such calls as I. While I may not call often, my calls are often unanswered. And because I am calling for little more than to "catch up" there's no reason to ask why that is. I much prefer leaving a message that may or may not get a reply than to force us into a conversation that really isn't one.

So, bottom line is nothing has changed. Call when you wish, answer when you can.