Is there any automated program or way to track connection speed over a set time. DSL provider claims there is no issue here but it slows to a crawl from around 3:30 to midnight. 2AM is good speed again.

Would like to provide a log of speed test results during an extended  period as proof that their capacity is oversubscribed during peak hours. 

Only way to do currently is to run speed test and screen shot it all.

Would be nice to have a log of speed test results every 30 or 60 minutes for say a week as proof of way less delivered speed vs what is being paid for.