When it comes to online reputation, there is no exact timeline. The duration of an online reputation management campaign is highly dependent on the severity of the amount of content to rectify or remove. That said, Google typically recognises changes in indexed sites and profiles every two to six weeks.
Instead of looking at an overall time to repair damaged reputation, you should set several milestones along the way. Determine the various elements where you would like to see the reputation improve and what you would like to see in a specific timeframe. With these criteria set in stone, you’ll feel more satisfied when results are achieved.