ruby on rails - Build a cron expression -


i want build cron expression following - should run every 2 weeks , start specific day of month.

i tried build expression -

5 4 2/14 * * * (here want run cron @ 04:05 on every 14th day-of-month 2 through 31)

can help?

so, want run on 2nd, 14 days later, , again 14 days later? not enormous list, give list:

5 4 2,16,30 * *

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