Reduplication as pluralization is optional and rather marginal in Diu Indo-Portuguese. The fact that its use is circumscribed to older speakers, as well as the corpus compiled for Schuchardt (1883), make it clear that reduplication was in the past a recurrent pluralization strategy.
The intensifying function of reduplication is considerably more common. Reduplication also has distributive meaning in modern Diu Indo-Portuguese.
Source: Cardoso 2009: 175
Source: Cardoso 2009: 122
Source: Cardoso 2009: 120
Source: Cardoso 2009: 122
Source: Cardoso 2009: 123