"Sample and hold" TOP

What is the best method to “Sample and Hold” a TOP? I am using a Trace SOP for a movie file and want it to play back at normal rate but sample it at a lower frame rate. My inclination was to make a Timer CHOP’s “done” channel hooked into a “Select,” but I didn’t know what input to set as the “hold” channel. Or does the answer lie somewhere closer to a cache selector?

Anyway thanks for your help with this!

I figured it out as soon as I posted this – the Timer CHOP’s “Done” channel should Export to a Cache’s “Prefill” parameter.

If there’s a better or more efficient way to accomplish this, though, I’d appreciate it!