French phrase
À quelle fréquence ~ a-t-il lieu ?
Meaning
How often does ___ take place?
When to use it
Asks how often a recurring event takes place. It is slightly formal but common in everyday use.
Example dialogue
À quelle fréquence le cours a-t-il lieu ?
How often does the class take place?
Il a lieu deux fois par semaine.
It takes place twice a week.