Repeat again?

Hi,
I’ve heard from many of my teachers that we can never use “repeat again”, but when I check it in the BNC, I found that it is used quite a lot:

sara.natcorp.ox.ac.uk/cgi-bin/sa … peat+again

Many thanks
Nessie

I think ‘repeat again’ is a bit of a tautology which doesn’t mean it’s not used. It’s simply that it might not sound very good.[YSaerTTEW443543]

TOEFL listening lectures: Why does the professor mention Cygnus X-1?[YSaerTTEW443543]