Discard Guidance

Hello! I just started making sourdough last fall after being gifted some 60yo starter. I feed and bake once a week, and my starter lives in the fridge. I have a decent handle on baking bread with active starter (after lots of practice). Can someone please explain to me how long after feeding I can use the discard? I typically only bake on weekends, as I work outside the home full-time. Is the hungry starter safe to use on day 5-7 for discard recipes? I feel like I only conceptually understand using discard when you’re feeding daily.

Thank you for any info ☺️