scheduleExpression

The expression that defines when the schedule runs. cron expression is supported. A cron expression consists of six fields separated by white spaces: (minutes``hours``day_of_month``month``day_of_week``year)

You can schedule rules to run at most once per day. Your cron expression must use specific values (not wildcards) for the minutes and hours fields. For example: (30 12 * * *) runs daily at 12:30 PM UTC.