Recurring update of address book

Hello, I have a small school and students' info is kept in filemaker. I can export this info to csv or many other file types.

How do I set a script to periodically import (update) this data into my address book?

Thanks,

New to automator and applescript.

The Updating is the hard part, as AddressBook will Import a CSV. File > Import

It would need to be AppleScript.
You'll need to script something that

Open the TextFile to a String
Make the String a List
Loop through the List and try to get an AddressBook Person based on Field in List
If not Find Person the Add Person
Update Details

AddressBook is a headache to Script but it can be done.