Call 1 - 12:01 AM 10 minutes
Call 2 - 12:02 am 15 minutes
Call 3 - 12:07 am 20 minutes
5 minute time line
Time Number of calls
12:00 - 12:05 2
12:05 - 12:10 3
12:10 - 12:15 3
12:15 - 12:20 2
You don't need to allign the start time of the calls. All you really care
about is the range of time. the time period doesn't havve to be fixed,
instead it can be a delta time.
Suppose you had two projects at work and one started in January and the
other started in April. You want to to compare the two jobs. You can
compare the by the number of weeks from the start date. Compare tthe 1st
week of job A against the first week of job B. Then compare the 2nd week of
both jobs, and the 3rd week of each job.