Testing 10-minute burst reviews for busy weeks

During a high-stress month, I compared daily 10-minute flashcard sessions against my usual 45-minute deep dives. My recall rate only dropped by 5%, whereas skipping days entirely led to a 30% loss within a week. I am looking to optimize this further. Has anyone experimented with specific intervals or 'reduced' routines that successfully maintain advanced vocabulary when your schedule tightens up?