BackupBuddy: Recommended Backup Schedules
We recommend scheduling your backups for times when the traffic on your site is light. The following are recommendations for Database Only and Complete (Full) Backups.
Database Only Backup: Weekly
We recommend performing a Database Only backup to back up your database on a weekly basis, since your database changes much more often than your files and folders.
Complete (Full) Backup: Monthly
BackupBuddy recommends doing Complete Backups every 2-3 weeks, since your files only change when you add or upgrade plugins, themes or your WordPress version.