You might want to try out this solution: 

note that it will not run more frequently then what is timer job frequency, which is by default 5min

This would imply that there is not a way to schedule a site workflow. Is that accurate?

The timer job is scheduled for every 5 minutes. There is no option to select minutes when scheduling a site workflow. That is my question. How to schedule a site workflow for X minutes?

there is not direct/configuration way to do that.

I wanted to point out that even if you used a solution provided by ‌'s link and set up the loop to run every minute, it would still get it turn just once in 5 minutes.

OK, thank you! That is what I needed to know.

‌, Just wanted to make sure you found the answer you needed for your scenario. If so, please mark one Correct above or let us know if anything needs clarifying. Thanks!