Suggesting A Perticluer Time is Not Possible. It Depends On How Your Competitor And The Users Try To Harm Your Reputation Which Strategy They Use And How Much Authority Links They Used To Promote Negative Information About Your Business. If It's At a Low Scale, Then You Will See The Results Within 2 Months And If They are Damaged A A Lot, Then You Have To Wait For 3 To 5 Months.