Consular Interview for GC, India

I got a confirmation email from NVC regarding my case completion on September 9th for my EB3 green card and my foreign state of chargeability is India and the consulate is Mumbai.
I am waiting for the consular interview and wanted to know, how much more time (around 3 months by now) it may take for the interview. What is the on going processing or wait time.
I appreciate your help in this regard.