How to make cron every 3.5 hours?

Question

Task Schedulers

Good day. How to make crons every 3.5 hours in cpanel? there is an option 0,30 */3 * * *, but something is not sure.

Answer 1

Your notation means "when the hour is a multiple of three and the minutes are zero or thirty".
You can make an interval of 3.5 hours in the crown only by writing down all the moments manually

00   0,7,14,21   *   *   0
30   3,10,17     *   *   0
00   4,11,18     *   *   1
30   0,7,14,21   *   *   1
00   1,8,15,22   *   *   2
30   4,11,18     *   *   2
...