scheduleExpression
Specifies your task schedule by using a cron or rate expression.
Use cron expressions for task schedules that run on a specific time and day. For example, the following cron expression creates a task schedule that runs at 8 AM on the first Wednesday of every month:
cron(0 8 * * 3#1)
Use rate expressions for task schedules that run on a regular interval. For example, the following rate expression creates a task schedule that runs every 12 hours:
rate(12 hours)
For information about cron and rate expression syntax, see the Amazon EventBridge User Guide.