What's the difference between DbType.Time and DbType.DateTime?

[tacosontitan]

I'm trying to mark a property with a custom attribute which takes a DbType to specify what the database type is for the property, and in this case my property is a TimeSpan?:

[SqlColumn(nameof(Sample), DbType.Time)]
public TimeSpan? Sample { get; set; }

According to the documentation for DbType, this is the wrong member to mark with:

A type representing a SQL Server DateTime value. If you want to use a SQL Server time value, use Time.

I can't follow the recommended path of using SqlDbType.Time because it's not interchangeable with DbType. Furthermore, DbType defines a member named DateTime which causes further confusion:

A type representing a date and time value.

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What's the difference between DbType.Time and DbType.DateTime?