Detectability of a formed 10¹⁵ G millisecond magnetar as a function of time. Results are shown for the current (full) and next generation (dashed) of GW interferometers, and distributed in the free (yellow) and trapped (blue) zones configurations, assuming the DD2 EoS and MXT X-ray sensitivity. The number of detections at a given time is normalized by the total number of magnetar detections over all times and configurations for the considered GW configuration.