cf. Callimachus, Aetia, fr. 1.4–5: εἵνεκεν οὐχ ἓν ἄεισμα διηνεκὲς ἢ βασιλ[η ....]ας ἐν πολλαὶς ἤνυσα χιλιάσιν

"[They criticize me] Because I haven't completed one continuous song in many thousands of lines."

Cf. Callimachus Aetia, fr. 1.9: ὀλιγόστιχος, ἀλλὰ καθλέλκει.