Oh wow, that's a lot of ad breaks
In Germany, no matter which station shows NCIS, it's 2 ad breaks per episode. One quite early (like 7-8 minutes into the show), and the other one at around 35 minutes, so it's a total of one hour of NCIS including the ad breaks.
When I was in the US I was confused about the amount of ad breaks, I guess it would be the same for me in Australia
How long are the ad breaks? Ours are about 9 minutes per break.