Use a cumulative frequency report to generate a graph showing how data field values vary with respect to one another. A selected range of records are grouped according to the value of one of their data fields (called the Interval Field) and the total value of another data field (called the Frequency Field) is reported for the groupings on a cumulative basis.

An example of a cumulative frequency report is provided below. In this report, Total Ore Tonnage has been divided into increments of Au Grade. The Total Au Grade is the Interval Field and the Total Ore Tonnage is the Frequency Field. Such a graph is useful for determining the ore reserves that are available below some quality cut-off.