Thanks for your interest in Jetpack VaultPress Backups!
Jetpack VaultPress Backup performs full, incremental, and differential backups.
The first backup is a full backup of your site. Subsequent backups are incremental, backing up only the files and/or database tables that have been changed since the last backup was saved. Finally, differential backups are the “real time” backups, saving the data that was introduced or changed since the last complete backup.
It’s not possible to set backups to run exactly every hour, but a backup would be triggered anytime a change to your database was made. Would that work for you?
These articles might shed some more light on the topic:
https://jetpack.com/support/backup/#frequently-asked-questions-faqs
https://jetpack.com/support/backup/jetpack-vaultpress-backup-storage-and-retention/
