LogSync is not a scheduled batch job, it runs continuously and will pick up archive logs within minutes of their creation. You can run SnapSync once a day (for example), but you'll still have point-in-time recovery options because of LogSync.
You can also disable LogSync. SnapSync will always gets the logs it needs to make a snapshot recoverable (and therefore able to make VDBs!)
You could disable LogSync and run SnapSync every hour if you like, and that would give you 24 recovery points a day and saves space on your Delphix engine.
Finally, you can have separate retention for logs, for example 90 days of snapshots and 2 days of logs would give you point-in-time recovery for a couple of days, and less granular options for a long duration.