# `AggregationsRateAggregation` [interface-AggregationsRateAggregation]

| Name | Type | Description |
| - | - | - |
| `mode` | [AggregationsRateMode](./AggregationsRateMode.md) | How the rate is calculated. |
| `unit` | [AggregationsCalendarInterval](./AggregationsCalendarInterval.md) | The interval used to calculate the rate. By default, the interval of the `date_histogram` is used. |