How many appearances required in court to get mutual divorce?

you would have to go to the court only twice (minimum) in six months. If the judge refers you to mediation you can refuse. If at all you are referred to mediation, you can tell the counselor that you both don't want to reconcile.

Sir/Madam, in Delhi the parties are able to obtain a decree of divorce through a mutual consent petition after 2 visits normally. The parties also do not go through counselling except where the court feels there is a real possibility of reconciliation