To schedule this observer for a particular time duration.

- Every Day: The observer is triggered on the specified time each day.
  Example: If you select the time from 15:00 to 16:00, the observer is triggered at this time each day.
- Every Week: The observer is triggered on the specified time of the selected day of a week.
  Example: If you select the time from 15:00 to 16:00 for Monday, the observer is triggered at this time on each Monday.
- Every Month: The observer is triggered on the specified time of either every particular day of the selected week or every selected day of the month.
  - Example - 1: If you select the time from 15:00 to 16:00 for the second Monday of the month, the observer is triggered on that time.
  - Example - 2: If you select the time from 15:00 to 16:00 every 15th day of the month, the observer is triggered on that particular time of the selected date.
- Every Year: The observer is triggered on the specified time of either every particular day of the selected week of the month or every selected day of the month.
  - Example - 1: If you select the time from 15:00 to 16:00 each second Monday of March, the observer is triggered on that time.
  - Example - 2: If you select the time from 15:00 to 16:00 every 15th day of March, the observer is triggered on that time.
- Custom:: The observer is triggered on the specified date and time.
  Example: If you select the time date and time from 15:00 PM 18/05/2021 to 16:00 PM 18/05/2021, the observer is triggered on that particular date and time.