You're showing how little you know about swimming.
Even a short practice would usually be at least 2,000 meters. I highly doubt she did one short practice every three weeks. I think she swam a little more than that to get to a world-class level.[/quote
I'm a former swimmer, same sort of events as her. I wasn't at her level, but had many Olympians as teammates. 2000 meters would be a decent warm up. Our doubles were typically 12k in the AM and 10k in the PM. Doubles 5 days a week in summer. Still doesn't reach the mileage in the initial estimate....but a more accurate view than many are posting.
And to the poster who commented about hours face down in the pool... You, lots of hours staring at the black line. Does make it easy to do a long run without tunes though
Did you keep a log in those days? 22k in a day sounds like a lot. I'd be interested in seeing your log for any normal week where you had at least two of these 12k/10k doubles. Certainly sounds possible for a short period of time, but I wouldn't have thought that even elite distance swimmers were doing quite this much distance on a regular basis.