Plotting duration on chart

hi,

I want to show time taken by a process to complete in seconds on time chart.

sample log entries

4432 [e0] INFO 2013-04-18 05:58:46.764 TM1.Process Process "TI_1" executed by user "Admin"

4432 [e0] INFO 2013-04-18 05:58:55.796 TM1.Process Process "TI_1": finished executing normally, elapsed time 9.02 seconds

4432 [e0] INFO 2013-04-18 06:01:45.400 TM1.Process Process "TI_1" executed by user "Admin"

4432 [e0] INFO 2013-04-18 06:01:55.243 TM1.Process Process "TI_1": finished executing normally, elapsed time 9.84 seconds

4432 [e0] INFO 2013-04-18 06:02:26.038 TM1.Process Process "TI_1" executed by user "Admin"

4432 [e0] INFO 2013-04-18 06:02:28.627 TM1.Process Process "TI_1": finished executing normally, elapsed time 2.59 seconds

Example values of duration from above log entries are 9.02 seconds and 9.84 seconds etc. We want plot these values on chart

Thanks