How many times can you shock someone with a defibrillator

When a cardiac arrest occurs to a patient defibrillator is advised to use in a such critical conditions so there is few clinical criteria where Defibrillator & Its Shock delivery Count Matters:
If any Patient gets cardiac Arrest first CPR (Cardio Pulmonary resurrection) is advised with a 30:2 Proportion then mouth to mouth breath is advised by doing this activities if patient not wakes up or his/her Heartbeat pumps then Defibrillator is advised to use with selection of appropriate Joules of Shocks.
As Per Patients Physical & Clinical Condition defib Can be used 3-5 Times Shocks as per under physician observations.
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