[[schedule-interval]]
==== Interval Schedule
A <<trigger-schedule, `schedule`>> that triggers at a fixed time interval. 
The interval can be set in seconds, minutes, hours, days, or weeks:

* `"Xs"` - trigger every `X` seconds. For example, `"30s"` means every 30 seconds.
* `"Xm"` - trigger every `X` minutes. For example, `"5m"` means every 5 minutes.
* `"Xh"` - trigger every `X` hours. For example, `"12h"` means every 12 hours.
* `"Xd"` - trigger every `X` days. For example, `"3d"` means every 3 days.
* `"Xw"` - trigger every `X` weeks. For example, `"2w"` means every 2 weeks.

If you don't specify a time unit, it defaults to seconds.

NOTE:   The interval value differs from the standard _time value_ used in Elasticsearch. 
        You cannot configure intervals in milliseconds or nanoseconds.

===== Configuring an Interval Schedule
To configure an `interval` schedule, you simply specify a string value that represents the interval.
If you omit the unit of time (`s`,`m`, `h`, `d`, or `w`), it defaults to seconds.

For example, the following `interval` schedule triggers every five minutes. 

[source,json]
.Hourly Schedule
--------------------------------------------------
{
  ...
  "trigger" : {
    "schedule" : {
      "interval" : "5m"
    }
  }
  ...
}
--------------------------------------------------
