**Potential ideas:**

Hard statistics:
* using timestamps to compute ratio of messages in certain time interval
* using join time/leave time to compute user´s time online over certain period of time
* limit channel history checking to certain time interval
* limit channel history to certain scope of users (people from same team, admins...)
* finding the moment where conversation had most messages for certain time interval
Soft statistics:
* identify dialogs
* statistics for dialogs (length, participants..)
* analysis of dialogue - keywords, named entities, topics