Univerbation ofquantīs(“how much, of what size”,abl. pl.) +-per(“through”), originally a postpositional phrase.
quantīsper (notcomparable)
- (interrogative or relational): how long, for how long
c. 180BCE,
Caecilius Statius,
Ephesio 511, 30:
- Nonius: velim paulisper opperiri te.Quantisper? Non plus triduum
- Nonius: I might want to wait a short time.For how long you ask? For no more than three days.