Scrum artifacts should be inspected frequently during Scrum events. Specifically, the following guidelines apply: 1. **Daily Scrum**: The team inspects the progress of the Sprint and the state of the Product Backlog items daily. 2. **Sprint Review**: At the end of each Sprint, the team inspects the Increment and adapts the Product Backlog based on feedback. 3. **Sprint Retrospective**: The team inspects their processes and teamwork to identify improvements for the next Sprint. In general, the frequency of inspection should align with the Scrum events, ensuring that the artifacts are reviewed regularly to facilitate transparency and adaptation.