German phrase
Wie lange muss ~ gültig sein?
Meaning
How long does ___ need to be valid?
When to use it
It asks about validity length. Use it to check insurance or documents cover your studies.
Example dialogue
Wie lange muss meine Krankenversicherung gültig sein?
How long does my health insurance need to be valid?
Sie sollte mindestens bis zum Ende des Studiums gelten.
It should be valid at least until the end of my studies.