y, there will be no event type pair where the two events will have greater time difference than
the one described by the parameter lookback.</p><p>The generated pairs follow a Skip-till-next-match policy without overlapping in time. That is, in order to be two
occurrences of the same event type pair in a trace, the second one must start after the first one has ended.
For example: the trace t<sub>1</sub> = (a,b,c,a,b) contains 2 occurrences of the event type (a,b). However, the trace
t<sub>2</sub> = (a,a,c,b