After ankle bone bruise healed how many month of exercise should i do to get back to soccer?

No set amount: If the bone bruise is healed you can resume strengthening and balance exercises. You can also go through a "functional progression" of light straight ahead jogging, faster jogging, running, sprinting, jumping and finally cutting and pivoting. At each stage if you have pain then back off. If not then progress ahead until you can do everything. At that stage you can return to play.

Until comfortable: Until you feel that the ankle is stable and you are able to run and cut as you did prior to the injury.