With help of Duplicate order, you can copy the same order and place it again. This helps to overcome the freeze quantity limit.
For example: If freeze quantity for Nifty futures is 1800 and you want to place an order of 3600 shares. You can add one Nifty order with 1800 quantity in the basket and click on Duplicate; this will result into another duplicate order of 1800 quantity in the basket and hence taking the total quantity to 3600.