It’s really recommended that you don’t, because backups will incur a lot of CPU cycles and disk I/O (that would negatively affect performance) for not that much benefit.
But should you choose to, you would use the crontabs. Using an online crontab generator:
Every 10 minute(s) starting at minute :00
Or just use the examples at the bottom. Keep in mind, many formats exist–use one that takes into account ‘seconds’ as an interval.