Mail Alerts for HANA Configuration - change in Timing?

Dear Guru's,

Recently we have got a request to configure HANA Alerts on Backup for database & log backups. I have configured those alerts but it is being triggered only once in a day. Is it possible to change it to 12 hours or 8 hours?
Do we have any hdbsql query for the same.

Also Database Backup alerts are being received only incase of any failure, Is it possible to send successful logs as well?

Thanks & Regards,

Mithran