Custom report for downed interfaces

I have tried different reports but none of them really show what I am wanting. I am wanting to create a monthly report that shows how long interfaces have been down for on selected devices for the report so we can monitor what is no being used to remove unused connections. Is there a way to do this? I wish to have a report that kind of shows how it does on the  interface page of the managed nodes but instead of hourly it shows the number of days said interfaces have been down.