1.2K.
I did the first two laps with a kickboard. So I kicked hard without worrying about breathing, because the fact is, though I have always believed I can do a passable Australian crawl or freestyle, I think really I cannot. If I could, I could kick hard and coordinate my breathing at the same time.
Those two initial laps did seem to be better preparation than just shoving off and swimming. If I had swum properly for the entire time I could have done my proper 2K. I maybe shouldn't've counted those first two in the total laps, but I did, so when with them I got to ten I just blew off for the last two, casually doing the matron's breast and side strokes.
A real breast stroke is what they do in the Olympics, where your head is aligned with your spine and goes under. The matron breast stroke, which is not meant to sound as racy as it might, is what I call the head-above-water, not to mess with the hairdo, frog-kick, scoopy-with-the-forelegs thing. A sidestroke is another for people who can't breathe right. It's an amble instead of a stride kind of swim. I like it because the sideways scissor kick makes me feel vaguely like a squid.