yep, it's working as you suggested and I've found the mention of seconds (and of 120 updates per minute in a flapping rule).
I'm just pinging /api/v1/alive, and I hope you'll add a more granular timer natively. I need to update some aggregate home energy data every 15 secs, because the relative sensors are updating very frequently (via MQTT, as I've already reported) and I cannot watch for sensors, it will flap too easily. For now, case closed, I guess. Thanks!