Is it possible to view or change the update frequency of NTP client?
See http://www.ntp.org/ntpfaq/NTP-s-algo.htm#Q-ALGO-SERVER-POLL
Why do you want to change the polling intervall? What are you trying to achieve?
Just wanted to see if it does not have any overhead on the router.
It dynamic and becomes more frequent with large errors and less frequent as the time become more accurate.