Practicing even just a little bit every day will probably help you more than practicing for an hour once a week. If you’re pressed for time, try working on just one idea when you pick up the guitar.
The one idea could be, “I’m going to get really good at this E to G chord change.” Or see if you can memorize that new scale you learned a few days before.
It can get overwhelming when you feel like you have to practice everything you know, every time you pick up your instrument, so streamline it: give yourself a simple, tiny warmup that you do every time, and then work on one, maybe two ideas. That’s fifteen to twenty minutes of practice, right there.
I’m not saying you should limit your daily practice to twenty minutes, but if that’s all the time you have during a crazy week, do what you gotta do. Just keep playing every day!