καὶ τοὺς θηρίων ἔρωτας οἴονται κυρίους εἶναι μάρτυρας μᾶλλον ἢ τοὺς τῶν ἐν μούσῃ φιλοσόφῳ μεμαντευμένων ἑκάστοτε λόγων.
I think ἑκάστοτε is put here for some emphasis without actually meaning ‘on each occasion’.
καὶ τοὺς θηρίων ἔρωτας οἴονται κυρίους εἶναι μάρτυρας μᾶλλον ἢ τοὺς τῶν ἐν μούσῃ φιλοσόφῳ μεμαντευμένων ἑκάστοτε λόγων.
I think ἑκάστοτε is put here for some emphasis without actually meaning ‘on each occasion’.