[X4U] iDisk auto synchronisation rate

[stephenpassmore at mac.com]

Hello All,

I've searched high and low for the answer to this, honest!

When having a local copy of iDisk with automatic synchronisation, how 
often does it synchronise?

The only reference I've found is in the OS X help, "Though your iDisk 
synchronizes automatically at set intervals when you're connected to 
the Internet, you can also manually synchronize it at any time.", but 
no where can I find what this interval is.

Thanks, Stephen