From Hathaway,
The Arab Lands Under Ottoman Rule:
During the Ottoman period, the word ‘Arab’ did not have the ethnonational connotations it does today but instead was a somewhat derogatory term used by speakers of both Arabic and Ottoman Turkish to refer to a nomadic or semi-nomadic inhabitant of the desert or the rural hinterlands of towns. (In Ottoman Turkish, furthermore, ‘Arab’ also frequently connoted a sub-Saharan African.) On the other hand, cities, towns and villages in the Ottoman Arab provinces were inhabited by Arabic speakers who tended to identify themselves by their places of residence and/or by the confessional communities to which they belonged.
So probably an eighteenth- or nineteenth-century POD could work.