This is a judgement call.
One of the big advantages of our approach is that it enables suitability to be dynamically responsive to changes in client circumstances with very little cost. This is vital in crises, where all investors' circumstances are potentially changing substantially at the same time.
We recommend refreshing financial circumstances information once a year (or more frequently in changeable times).
Risk Tolerance should be reassessed at least every couple of years (depending on local regulation), and other Financial Personality dimensions on preference.
Knowledge and Experience needs to be re-run only if it starts Low, as investors improve their scores over time.