ICMP Probe Functionality DNS --> Question

DNS probe options

host (Default:"") DNS name that should be resolved.
record-type (A AAAA MX NS; Default: A) Record type that will be used for DNS probe.
dns-server

Question: There is no indication how often this probe is run. No indication of interval or anything?????

( Does one have to set the interval manually, and assume no defaults for this particular probe? )
( If so, what would be a reasonable interval to make sure DNS is working? )

netwatch? default interval is 10s (except for type "simple", it is 60s interval by default - undocumented).

One would think..............

Okay, thats what I was looking to confirm.
If I have a script that adds to an address-list, that times out after 5 seconds, then
it would be best to set the interval to 4 seconds..