When I'm not sailing, I'm usually working (playing music or writing magazine articles). I usually get to sail at least one day a week. On days when I cannot go sailing, which is much of the winter, the free days are spent working on new songs, which I guess can be considered practice. During the past decade I've tried to learn at least one new song every week. Over the years that amounts to lots of new songs, all of which are used regularly. When I'm not working on a new song, I'm exploring the inner workings of my equipment and ways to make it sound better, I guess the answer to your question is, at least for me, is one day a week, every week of the year.
Good question,
Gary
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PSR-S950, TC Helicon Harmony-M, Digitech VR, Samson Q7, Sennheiser E855, Custom Console, and lots of other silly stuff!
K+E=W (Knowledge Plus Experience = Wisdom.)