Some of most used crontab syntax mentioned below,

- every 1 minute
- every 2 minutes
- every even minute
- every 3 minutes
- every 4 minutes
- every 5 minutes
- every five minutes
- every 6 minutes
- every 10 minutes
- every 15 minutes
- every fifteen minutes
- every ten minutes
- every quarter hour
- every 20 minutes
- every 30 minutes
- every hour at 30 minutes
- every half hour
- every 60 minutes
- every hour
- every 1 hour
- every 2 hours
- every two hours
- every even hour
- every other hour
- every 3 hours
- every three hours
- every 4 hours
- every 6 hours
- every six hours
- every 8 hours
- every 12 hours
- hour range
- between certain hours
- every day

- daily
- once a day
- every night
- every day at 1am
- every day at 2am
- every day 8am
- every morning
- every midnight
- every day at midnight
- every night at midnight
- every sunday
- every monday
- every tuesday
- every wednesday
- every thursday
- every friday
- every friday at midnight
- every saturday
- every weekday
- weekdays only
- monday to friday
- every weekend
- weekends only
- every 7 days
- every week
- weekly
- once a week
- every month
- monthly
- once a month
- every other month
- every quarter
- every 6 months
- every year