If the grouping time is set to zero, that is, no grouping is defined for the publication,

Data Integration Hub

creates an event each time data is published to the publication repository.

If you define a grouping time,

Data Integration Hub

creates an event at the end of each grouping period that contains publications. For example, if you configure the publication to group publications every ten seconds,

Data Integration Hub

creates an event every ten seconds, providing that data was published to the publication repository during the 10-second period.