Count the repeat pattern in SAS or R

I have a dataset which has all the clicks done on the website in 1 column. I want to find the pattern which gets repeated in the whole data and the data contains more than 1 Million rows and has 17000 different pattern. I also want to know the average time spend on each click for each pattern. I have written a code in SAS which groups each pattern and also finds the time difference between each click but I am not getting the output how I want. For example, according to my code I am getting this output:

Clicks Group Time(Seconds)

A 1 6 B 1 2 C 1 0 D 2 12 E 2 5 F 2 0 A 3 9 B 3 6
C 3 0 H 4 8 I 4 9 J 4 0

Output expected: Clicks Average Time Count ABC A-7.5,B-4,C-0 2 DEF D-12,E-5,F-0 1 HIJ H-8,I-9,J-0 1