Enhancement: SaaS Workflows Open Beta Update

I have two workflows setup to use the Scheduled trigger. Both are enabled, but neither have executed in the last 2 days. Is the Scheduled trigger broken? Or am I using the cronString incorrectly?

One that should run every 2 hours at the top of the hour.

    "trigger": {
        "type": "SCHEDULED",
        "attributes": {
            "cronString": "0 */2 * * *"
        }
    }

And one that should run daily (not sure if workflows except this format but it didn’t error when I put it in).

        "trigger": {
            "type": "SCHEDULED",
            "attributes": {
                "cronString": "@daily"
            }
        }