Thanks, BSD - so it appears that the 'quadrant' expression exists only in the mind of someone writing a tech manual for an a/c computer system, and if required, ATC should have issued a holding octant which would have had all the drivers reaching for Google on their I-Phones.
We therefore vote this instruction as .....................
Bite - it wasn't issued by a very young sounding voice, was it?
PS BSD - are you someone's wife?