Do not hide an 'Advanced Schedule' on Schedule blade
The idea to hide an 'Advanced Schedule' on Schedule blade when minute or hour recurrence is selected is definitely an extremely bad idea!
I was looking for advances scheduling for 6 hours today and even wrote my own ARM template for this. I've discovered the schedule service REST API, ARM schema, all PowerShell cmdlets, etc. But accidentally I've discovered that it is simply hidden! :)))
Please, do not hide such things in UI.