Both.

I'm fortunate enough to have plenty of available time, so most days I get in two practise sessions of 45~60 min duration ea av, sometimes more if I include ad hoc sessions which could be anything from a couple of 15~20 min passing pickups or a single 30 min.

I try to get in at least one specifically tasked practise session early each day. I usually discipline it to be the first A. because I'm a morning person, and B. in case something comes up and I don't get to do another that day. The other session will be random. It could be related to the earlier session or totally do as I please. Ad hocs might be either. Reinforcement of something specific, or just free reign.

I tend to have a play-free rest day only when I need to be away from home, a pre-committment interferes with time available, am biorythmically flat and feel in need of a day off, fatigued or unwell. I don't really have to discipline myself to practise as such as a natural enthusiasm seems to be maintained by still just enjoying the learning journey and the playing, all of it. I'm sure I'll inevitably plateau at some stage where I just have to work through the phase with determination and self-discipline, but not yet. It's only nine months since I bought my first guitar and started, so still early days. Tempus fugit.