# `Arrow.Type.Duration`

64-bit elapsed-time column in a fixed unit.

# `t`

```elixir
@type t() :: %Arrow.Type.Duration{unit: unit()}
```

# `unit`

```elixir
@type unit() :: :second | :millisecond | :microsecond | :nanosecond
```

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*Consult [api-reference.md](api-reference.md) for complete listing*