time element

I have set up 2 newsletters, and 2 autoresponders [ARs].
Instead of using days on the ARs, is there some way to set the time in minutes? I can’t test functionality by waiting days for an action to happen. To make sure everything is working right, I want to wait only a couple minutes, not days.

Thank you.

https://www.ads-software.com/plugins/wp-responder-email-autoresponder-and-newsletter-plugin/