plotting disp-real time

[Me09]

Hi, I have a basic question on plotting the disp-real time.
My problem is on sinking an object into the water. I have run the problem in Explicit and it was working fine. Now I want to get the result of sinking of the object versus the time. if i go for disp-time it shows the disp against step time but i need the real time. does anyone know how i can get the information of the time which object travels into the water? thnx

 

[Me09]

Just one more thing, it took about 20 hours to run the program. the CPU time was showing this but when I calculated the time from displacement and velocity graphs the time of traveling of the object was much different. does anyone know how I can request the time of traveling of the object along with its corresponding displacement? thnx

 

[Me09]

my theoretical calculation shows the object should fully sink about 24 hours but the the time from displacement and velocity graphs talk about few seconds. what do you think guys? thnx