This will depend on your goals and circumstances. A larger quantity of negative content will likely take longer to remove, especially if they are posted on high authority domains that already rank high on Google. If you have existing assets such as websites, blogs, or social media accounts that have high authority and can be used to promote new positive content, you will likely see much quicker results.
Another important factor is the reputation repair service that you employ. While cheaper services may promise you the same results, it might take years for them to improve your brand image. At First Page, we have over a decade of experience helping clients improve their online reputation with genuine results that reflect on their sales and conversion numbers. Get in touch with us to get a quote and audit.