Days to a few weeks depending on the product and the settings. Treat it as hours, and start recovery immediately.

A former employee deleted everything. What now?

Suspend rather than delete the account so the data stays, then restore from the admin console and change the passwords the person knew, see How do I choose strong passwords and store them? .

Can PikyHost recover a file for me?

On our hosting we can restore from server backups when a copy exists for the date you need. For Google or Microsoft data, the recovery happens in your own admin console and we can guide you through it.