How long before Solarwinds removes from the node list?

Solarwinds Family,

Hope you all are keeping well.

I was working towards creating audit reports of our assets and was wondering how long is it before Solarwinds removes a node from the node list when it stays down/unreachable for a long time(in the order of weeks and months) after it's initial discovery?
Or does it keep it in the inventory forever? Is there a way to manipulate this behaviour?