For SMS-managed data sets, you can specify a different backup frequency for each management class. This lets you have as many different backup frequencies as you have management classes. For non-SMS-managed storage, you can specify only one backup frequency for all volumes processed by any one DFSMShsm host. You can, however, change the backup frequency of individual non-SMS-managed data sets with the (H)ALTERDS command. See Changing the backup conditions for a data set for more information. Both the backup frequency specified for a DFSMShsm host and the backup frequency specified for a management class indicate the number of days that must pass between backups of any data set.
SETSYS FREQUENCY(1)