Scheduled Task - Run Every 5 Seconds

[Mko]

I've created a Scheduled Task that will submit a request to an API and store the value returned in a table in my database.
I'm interested in having this Scheduled Task run every 5 seconds, yet in the vB3 AdminCP, the only fields I see are Day of the Week, Day of the Month, Hour, and Minute. However, Minute has 6 fields attributed to it, which I am also confused about.

How would I get my Scheduled Task to run every 5 seconds through vBulletin?

Thanks,
Mark