Frequency classification (ISTAC: CL_FREQ)
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This classification provides a set of codes to indicate the "frequency" of the data (e.g. weekly, monthly, quarterly). The concept "frequency" can refer to several states in the production process, e.g. data collection or data dissemination. For example, a time series can be divided by annual frequency, but the data is calculated monthly. <br />
创建时间：
2023-09-21
