mezdem,
Here you go: Script_Filter_TimeInterval_byHost.txt
keep your message_text filter in place, get rid of your flags/counters interval filter, then make your first action a run_script action and use that script. You may need to do some basic editing, but I did set the default interval to 14400 seconds for you (240 minutes) so that may be all you want/need and in that case you won't have to edit at all.
It's just a text file though, and vbScript isn't so alien compared to T-SQL so you should be able to look at it and follow along. Think of dictionaries as tables that can only have 2 columns, a primary key column and a value column. If you want to store more than one piece of data, you have to delimit the value column.
My favoritest job ever was a database analyst/administrator. Loved it. I spent all day creating and deleting databases, moving stuff from Btreive in DOS and OS/2 or from Universe in Pick/Unix to SQL, Sybase, MySQL or Oracle.
Let me know if you have any questions and oh yeah... 120 minutes worked. Testing 240 right now, but we won't find out till tomorrow.