# Measure returning use with an explicit entry cohort and return window

Private worksheet. Unobserved remains unknown. Use only permitted necessary details, without names, passwords or private source files.

## Permitted entry/return event and distinct stable unit


## Frozen entry cohort, first-entry mode and exclusions


## Timezone, buckets, original base and full horizon


## Mature versus still incomplete periods


## Exact-period versus on-or-after rule and calculation


## Breakdown, device/identity gaps and allowed interpretation