Hi Kim,
We've realized that we can select every day of the week as suggested by Steven, then we can choose our time to be for example, 10 minutes from now. Once that email goes out, we can go back into the cadence and set it to be another 10 minutes from now, and so on. That allows us to run multiple emails in a day. It's a bit manual but better than having to wait weeks to properly test a program.