French phrase
En combien de temps intervenez-vous ~ ?
Meaning
How long does it take you to respond to ___?
When to use it
Asks about the response time for an emergency. It is commonly used to check when help will arrive.
Example dialogue
En combien de temps intervenez-vous en cas d'urgence ?
How long does it take you to respond in an emergency?
Nous intervenons dans l'heure.
We respond within an hour.