The concert is a Sunday afternoon concert,
so there's that -- we get to recover in the evening.
There are between 80 and 95 of us -- that's a wide variation,
it's just that we have got people missing rehearsals,
which vexes the director, we need everybody learning this music.
We're singing in the original German.

What the YouTube search probably implies is
how many chorus members are faithfully studying the piece
in between rehearsals, in order to learn their parts faster.
SOME of us will know our music on the day.
It's an amateur chorus out in the boondocks,
so it's no wonder we have some slackers
(especially in the bass section for some reason).