how long would it take to identify and off load 2 items of hold luggage?
Totally depends on a/c type and size of load!!
a 'loose' load is slightly easier than a 'containerised' load as you can rummage through straight away... Containerised.... If the bags were in the fist container on, then, of course, you have to offload the whole lot and then search for it / them..... Saying that... containerised, you know which one it's in!! Though any rampy worth his salt will know where the general location is on a loose load too.....
And then you have to reload!!