German phrase
Wie lange dauert ~ in der Regel?
Meaning
How long does ___ usually take?
When to use it
It asks about duration. Use it for a usual time estimate in a neutral, polite way.
Example dialogue
Wie lange dauert ein Austauschsemester in der Regel?
How long does an exchange semester usually take?
In der Regel dauert ein Austauschsemester etwa ein Semester, also fünf bis sechs Monate.
An exchange semester usually takes about one semester, that is, five to six months.