Also of note is the alarmd schedule. I use the 'cron string' scheduling in alarmd as I only want this script to run during my working hours.
Examples:
*/5 9-17 * * 1-5 <-- Every 5 minutes, 9am til 5pm, Mon to Fri, 365 days a year.

30 * * * 1-5 <-- Half past every hour, weekdays