Create and understand cron job schedules
Examples: * (every) | */5 (every 5) | 0,15,30,45 (specific)
• * = any value
• , = value list separator (e.g., 1,3,5)
• - = range of values (e.g., 1-5)
• / = step values (e.g., */5)
Day of week: 0 = Sunday, 1 = Monday, ..., 6 = Saturday