Report of each event when admin makes an assignment

Summary:

Is it possible to run a report of assignments that have been run, their date, the number of learners and the learning type/item, but without listing all the individuals records?
So if admin on 1st April, in the morning assigns a specialization to 1000 people in the organisation, but then in the afternoon, assigns Joe Bloggs one course, there can be a report somewhere that is made up of 2 records, which shows that two assignments were processed by admin, one for a spec for 1000 people, one for a course for 1 person.

All I can find is how to report on all required assignments, which produces a list of 1,001 records for the example above. (Incidentally that report also shows required assignments posted by other teams, without being able to see who did the processing - which is another matter).