Below is some software to monitor internet usage time you can use.
Best software to monitor internet usage time
This program will monitors your dial-up connection. DUTraffic will record statistics for each online session. You can see average traffic speed, total bytes received, connect speed, traffic counter and time counter.
Cucusoft Net Shield can easily monitor your broadband usage. It includes a Powerful Graphic Bandwidth Usage Report, bandwidth usage prediction, broadband speed test and much more. You can set traffic limit per month. This software can easily monitor and check your broadband usage. It helps you to find what is eating up your broadband and how much bandwidth they are consuming, with details statistics.