==== Layout of crontab ====
<code>
  -  +---------------- minute (0 - 59)
  -  |  +------------- hour (0 - 23)
  -  |  |  +---------- day of month (1 - 31)
  -  |  |  |  +------- month (1 - 12)
  -  |  |  |  |  +---- day of week (0 - 6) (Sunday=0 or 7)
  -  |  |  |  |  |
  *  *  *  *  *  /path/to/command
</code>

To get cron to run a task every 10 minutes, some Unix's allow this:
<code>
 */10 * * * * /path/to/command