Generate a Spaced Practice Schedule from a Skill List

Cramming a list of skills at once means you retain almost none of them. Give this the skills and your timeframe, and it builds a spaced practice schedule using expanding intervals and interleaving: an initial frequency per item based on its difficulty, then how the gaps widen once you've shown you've got it.

I need to build and retain the following skills or knowledge areas over the next {TIMEFRAME}: {SKILL_LIST}.

Create a spaced practice schedule using evidence-based spacing principles (expanding retrieval intervals, interleaving where appropriate). The schedule should:
- Assign an initial practice frequency to each item based on its complexity and my stated urgency
- Show how the interval grows once I've demonstrated solid recall or performance
- Flag which items should be interleaved in the same session and which should be isolated
- Include a rule for what counts as a successful repetition (so I know when to lengthen the interval vs. reset it)

Present the schedule as a week-by-week plan for the first {TIMEFRAME}, with a note on how to adapt it if I miss a session.