Per Azure documentation: All metrics have one-minute frequency (unless specified otherwise in a metric's definition).
Also, at least for VM guest metrics, when enabled the metrics are stored in an Azure Storage Table that aggregates 10 days of metrics, either at the minute or hour level. That's mentioned in this question.
Can either the metric frequency or the collection period for each table be controlled by users? For example, could we get metrics at 5-minute or 15-minute intervals, or restrict the table to 2 days or 5 days of metrics?