Final answer:
The frequency of observations for an individual with a NEWS chart score of 4 should be every 4 to 6 hours.
Step-by-step explanation:
The NEWS (National Early Warning Score) chart is used to assess a patient's physiological deterioration. A score of 4 indicates a moderate level of clinical concern. In this case, the frequency of observations that should be carried out is minimum 4-6 hourly. This means that vital signs should be monitored every 4 to 6 hours for any changes or worsening condition.
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