network scan in realsecure IDS

when monitoring the network sensor, i've noticed there are network scan on tcp445. Some detail are as following:

Sensor event From to info

NIDS01 network scan X.X.X.X X.X.X.X count-750


That means the network sensor has detected 750 times of same event (network scan). Bur how can I verify the frequency? I mean, it is 750 times/per minutes or 750 times/per hour?
anybody can help?

I'm very confident that this is a cumulative count. As far as finding time information, you'll have to look at the individual events to get a feel of the timing of these events. My look at ISS' RealSecure IDS 7.0 documentation did not indicate any way to filter your events by time received, it seems to just filter based on packet contents.

Here's a link to ISS' documentation on this IDS.