[Ben Bickford] “How do I work out what 0.5 cycles is”
“0,5 cycles” in regard to what time-frame?
I’ll assume per second.
In NTSC:
30 frames = 1.0 second
15 frames = 0.5 second
IF this is what you want, it would be a freeze-frame that remained on-screen for half-second, and refreshed (new freeze-frame) every half-second.