Duration - No creation interface exists. This type is returned when Integer data interacts with date/time type data.

Defining Duration:

    <Integer>.years;  

    <Integer>.months;  

    <Integer>.days;  

    <Integer>.hours;  

    <Integer>.minutes;

Example:

    Date date = "2019-01-01"  

    date = date + 1.months //Returns: 2019-02-01