superfluity

yltäkylläisyys The quality or state of being superfluous; overflowingness; in excess or overabundance.
Something superfluous, as a luxury.
puhekieltä collective noun|Collective noun for a group of nuns.
1905, Herbert A. Evans, Highways and Byways in Oxford and the Cotswolds, Macmillan and Co, (1905), http://archive.org/stream/highwaysandbywa00griggoogpage/n288/ page 266:

These probably mark the dwelling of a colony, or to speak more precisely, according to Dame Juliana Berners, a superfluity of nuns from Godstow, which nunnery had a cell there, and was patron of the living.

Alice put Anna back on the shelf and turned up the volume on the TV, where a local news reporter was imparting a salutary tale of woe involving a superfluity of nuns who'd got into a scrape at a crab festival.

(�) That man could charm the panties off a superfluity of nuns.”