Backups are no longer made every hour, but their frequency depends on the likely amount needing to be backed up. A hidden if not secret feature.
backup
Are your backups made every hour? Are you sure? Sierra might have become smarter as to how often it backs up.
How often, and how much? Decide by thinking through how you would use your backup to restore your Mac after disaster.
Don’t you want to search your backups? Like it or not, Spotlight will still index them, even if it doesn’t tell you that it is.
Do you keep off-site backups far enough away, and fully up to date?
A second hard drive failure in my Promise Pegasus RAID system forces some choices.
An overview of some of the many ways of keeping folders in sync, backing up, and making remote copies.
How I recovered my broken RAID backups, and got everything working again.
How can I find an old phone number in my Time Machine backup?
I have found some files with odd names which occupy lots of space. Can I delete them?
The Eclectic Light Company 