How can I get a more precise time for the median throughput time and the fastest and slowest case on the automatically generated page "Throughput Times (Details)"?

I always get only: fastest case 1.00 min or slowest case 14.00 min. But I would like to have a more precise time with seconds. I have already read the documentation & tried various things, but I am not getting further here. 

Can someone help? 

Thanks a lot