Interval - maneeshpal/Drata GitHub Wiki
When performing aggregation, an interval is expected for properties of type numeric and date.
For line, area and trend charts, the aggregation is performed if you specify an interval for x-axis.
For bar and pie, aggregation is performed when you set "groupby" and "groupby level 2" options in widget builder.
If the type of property is of type numeric, you should specify a numeric interval to perform aggregation upon.
If the type of property is of type date, the interval format would be in hours, minutes, seconds, days, month, quarter, year. See Formatting Date Intervals for more information and examples.
If the property is of type string , no interval is required.