12. The system of claim 10 , wherein the processing circuit is further operable to: compare the time representation to a second predetermined value; and identify a short-term time representation, if the time representation is lesser than the second predetermined value.
10. The system of claim 9 , wherein the processing circuit is further operable to: determine a first online event signal and a second online event signal based on each network device identifier's network activity; and determine a time representation of the time between the first online event signal and the second online event signal.