Samsung SEPA920WSAQST - Manual (Page 122)

100 Section 2G: Using the Phone’s Scheduler and Tools
Ⅲ
Press the navigation key left or right to select Once, Mon to
Fri, Sat & Sun, or Daily.
7. Select a snooze interval for the alarm by highlighting the Snooze
field.
Ⅲ
Press the navigation key left or right to select
5 minutes, 10 minutes, 15 minutes, or 20 minutes.
8. Select Done ( ).