Custom intervals - help

[Wosiek21]

Hi, i have to chceck one of my items at:
....
-16:59:55
-17:09:55
-17:19:55
-17:29:55
-17:39:55
-17:49:55
-17:59:55
-18:09:55
....
How i should shedule it?

[Wosiek21]

I tried:

Update interval:0
Custom intervals: Scheduling:m9,19,29,39,49,59
But how can i set seccond?

[cyber]

m9-59/10s55

https://www.zabbix.com/documentation/current/en/manual/config/items/item/custom_intervals