7. _Deux_ and _second_ may be used either way--Charles _deux_ or Charles
_second_.
§ 21. NUMERAL NOUNS.
unité, _unit_.
couple, paire, _couple_, _pair_.
trio, _three_, _trio_.
demi-douzaine, _half-dozen_.
huitaine, _eight days_.
neuvaine, _nine days of prayer_.
dizaine, _ten_.
douzaine, _dozen_.
quinzaine, _fortnight_.
vingtaine, _score_, _twenty_.
trentaine, _thirty_.
quarantaine, _two score_.
cinquantaine, _fifty_.
soixantaine, _sixty_.
quatre-vingtaine, _eighty_.
une centaine, _one hundred_.
deux centaines, _two hundred_.
un millier, _one thousand_.
deux milliers, _two thousand_.
un million, _one million_.
§ 22. FRACTIONAL NUMERALS.
1. Un quart, _one quarter_.
le tiers, _the third_.
la moitié, _the half_.
un cinquième, _one fifth_.