temporale
A cycle of texts to be read or chanted at liturgical services on particular weeks and movable feasts throughout the year; a book that contains this cycle.
The third and final volume of the temporale employs a different stave height and was clearly written later.
Where it comes from
Borrowed from Ecclesiastical Latin temporāle, substantivisation of temporālis (“of or pertaining to time”).
Adapted from the Wiktionary entry temporale (CC BY-SA 4.0).