Anybody figure out how to determine how much ITA searches? I know there is a limit, because you can search for A to B and it won't find the cheapest option (A to C to B), and if you limit the airlines sometimes you will find that A to C to B option.

I just find I have to plug in and plug in and churn away. It is really annoying.

I guess my question is what is the limit, or is it unknowable? Like, if I search daily and only from one airport to another is that good enough to look at all possibilities? Or could I stretch it to 2 cities to 1 city?