The Shortest Interval a Cloud Routine Can Run On

The correct answer is "No — the minimum scheduled interval for a routine is one hour."

A routine's Scheduled trigger supports recurring presets or a custom cron expression, but the minimum interval is one hour. A task that genuinely needs 15-minute cadence isn't a fit for a routine's Scheduled trigger — it needs a different mechanism, such as a session-scoped /loop (if an open session is acceptable) or a routine fired externally via its API trigger instead of on a schedule.

The distractors misstate the constraint: cron expressions in a routine don't support arbitrary sub-hourly intervals regardless of plan; the one-hour floor isn't an Enterprise-only relaxation; and routines do support custom cron, not just daily/weekly presets — the limit is the minimum interval, not the scheduling syntax.