Emacs automated Backup: Filename+DATE.org

Question

I am writing on a novel in Org Mode and I fear that at some point wide parts will be erased by me without noticing, therefore I want Emacs to automatically create backup files.

Google suggested different solutions for this issue which I am unfortunately not able to bring together (just started emacs half year ago, its hard to interpret the codes, and harder to write myself).

What I am trying to do:

example.org (backuping today)

• should be saved every x Hours or xxxx keystrokes
• Backups should therefore be named "example 17.6.15 11:35.org"
• In addition if possible: Delete all files but 1 of every day at the end of the week.

Is there maybe a Package with this features? (Is there another solution outside Emacs?)

I guess the following links looked promising:

• http://www.emacswiki.org/emacs/backup-each-save.el
• How do I control how Emacs makes backup files?