Hi,

Been working on this issue for the last couple of days with no luck. I have a column of data that is a data and time stamp, for any date or time like below. This is an ever growing list as users continue to populate the data.

13/04/2014 20:00
28/04/2014 17:30
09/04/2014 13:30
09/04/2014 14:00
03/05/2014 7:30
03/04/2014 11:10

On a separate sheet I have a list of times by 15 minute increments starting at midnight until 11:59PM like below.

12:00:00 AM
12:15:00 AM
12:30:00 AM
12:45:00 AM


I'm trying to count how often a time stamp occurred between two 15 minute increments. Eventually I'll be plotting this data on a graph to show where most occurrences happen.

Thanks in advance.