What is the minimum time interval for a Windows schedule task with a "trickle accumulation" and a thick, thin hair?

In some business systems, there are often some tasks that need to run regularly, the industry has a lot of good choices, such as Windows Schedule Task,quartz and so on. In the past in the new egg with the internal package of jobconsole, very good, is a very good product. Now in the new company, after the internal technical colleagues to discuss, decided to use Windows Schedule task. When you set up some jobs before, it seems that the minimum time interval for Windows Schedule task is 5 minutes, and some jobs that require a good time are only temporarily set to 5 minutes. Results The eldest one day to try to study, found that the time interval of the DropDownList is editable, so it can be adjusted small time interval. Ha ha.

Yes, the task execution time for Windows Schedule task can be edited, although it is a DropDownList.

What is the minimum time interval for a Windows schedule task with a "trickle accumulation" and a thick, thin hair?