German phrase
Wie viele ~ pro ~ gibt es?
Meaning
How many ___ are there per ___
When to use it
It asks for a per-unit count. Use it to check quantities in a specific context.
Example dialogue
Wie viele ECTS pro Semester gibt es?
How many ECTS are there per semester?
Pro Semester sind normalerweise 30 ECTS.
Normally, there are 30 ECTS per semester.