Lead scoring on downloaded assets

Hi All

I would like some help with understanding something in lead scoring. We want to score asset downloads. All assets come into one form and we only want to score certain types. I've created a CDO that the asset form submissions feed into. I want to score based on a specific asset which is possible based on asset name. But how do I score on multiple assets. So for example, download 1 asset get 50%, 2 assets get 75%, 3 assets get 100%. Also how would I look at downloads over time? So 3 assets in the last 30 days for