I just read about the tragic incident of the second game of the 50th Oza title match: Cho Chikun lost on time because he didn't realize it was his turn to move.

My question is: How often does it happen, that pros loose on time? Say in a relatively important match with sensible time settings (so Korean 10-minute-TV-matches don't count). Is there a list of such games or even sgf's?
If not, can you name such games?

A search in my (admittedly) outdated version of Gogod returns only 43 games lost on time out of more than 24000 games, the first one in 1926.

One of them, I find...interesting. In the 6th Tengen Challenger's final "Ushinohama fell asleep after the dinner break in one of the 8th floor Nihon Ki-in bedrooms" and lost on time after only 51 moves were played. Does it mean that nobody could find him and wake him up ?

I remember that one:
viewtopic.php?f=10&t=8074

I also found some other interesting comments on games lost on time:

44th NHK Cup


7th Maxim Cup final


8th North American Masters Final


I guess it tells us that pros are also humans and sometimes they make blunders. But it seems to be quite rare.