The frequency of source code reviews depends on various factors, including the size and complexity of the codebase, the development lifecycle, and the potential risk level associated with the application. Generally, organizations should aim to conduct reviews at critical stages, such as before major releases, following significant code changes, or when introducing new features. Additionally, regular scheduled reviews—such as quarterly or biannually—can help ensure ongoing code integrity and security. By maintaining a proactive approach, organizations can effectively manage risks and enhance the overall quality of their software.