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Quire
Archaic Term
The term 'quire' is outdated and rarely used in everyday language; understand it for historical or specialized texts. 
Specific Quantity
'Quire' specifically refers to 24 or 25 sheets, so don't use it to mean any small number of pages. 
Quality Consistency
A 'quire' implies sheets are of the same size and quality, important in printing and art. 