Most of the metrics I did were requested by management to be monthly, since they basically made decisions on a monthly basis, and anything more frequent than that would be ignored. Though, there was a set of "safety leading indicators" that senior management decided they wanted at the site level weekly so they could be alerted to any change quickly. It is a tradeoff of data processing costs, data overload on the decision makers, and how long can you wait until you discover a problem started one day after your last update.
