forty five per second

Sparks from the forty-five slashes per second burst out.
It was as if a large war sword of durable make was being steadily chipped away at amid
an exchange of blows.
The angel made no attempt to move back. Absorbed in this protracted battle, like it was
slowly but surely draining away Kanzaki’s stamina, it began to send out rapid strikes
with its watery wings at even more incredible speeds. Not allowing Kanzaki even a
hundredth of a second’s rest, it worked its dozens of wings like they were each a separate
creature and assailed Kanzaki from all different angles, directions, with varying speeds
and margins.

- Toaru Majutsu no Index Volume 4, Chapter 3 Part 5