Clock Divider
This module is designed to break the 24 pulses per quarter note from Midi into more musically useful intervals for the modular synthesist. The Midi usually comes via the master module on the Bus CLK output on the module.
It can be used to divide other clocks, e.g. an LFO or even a VCO.
If you need more complex division, there is the Multi Mode Divider module:-
These merchants probably sell this module. Huh?
Tangible Waves Beat Divider
Tangible Waves BEAT DIVIDER