Trigger after string has appeared N times in T time.

[gXXX]

I'm monitoring several PM2 services, and the problem is that they sometime generates thousands of mail after for examle an update that didn't go as expected.
The triggers look as following:

{Template App PM2:pm2.processes[{#PROCESS_ID},restarts].change()}>=1

{Template App PM2:pm2.processes[{#PROCESS_ID},status].str(stopped)}=1

The restarts could in worst case just be bumped up to >=N, but looking at the string value seems harder. According to the documentation you could write the trigger like this:

{Template App PM2:pm2.processes[{#PROCESS_ID},status].str(stopped,[B]seconds[/B])}=1

but it does not seem to do what I like.

I hope someone else has been able to solve this before and can provide some examples. Thanks!