如何在excel中停止覆盖信息（Java / Selenium）

I'm trying to record the time from page start until a specific thing is displayed and write that time into an excel file and then do it again for x times. Right now I am able to do it each time through the loop it is overwriting everything and I am only ending up with the last result. The other problem is that it's not putting the info where I expected it to put it. I just want all of the results in the first column. I've been banging my head against this one for days trying all the options I found in SO with varying success but never getting the result I've been shooting for. Any assistance will be greatly appreciated.I'm trying to record the time from page start u