Best slot for joke drops

Testing 12–18 second joke drops between uptempo tracks at:15 and:45 in PM drive, and my PPM minute-by-minute is flat — no bailouts, but no lift either. Before I bake this into the clock, are you getting better stick with quick punchline sweepers or one novelty track per hour (think Planet of the Bass/Peaches), and where do they play nicest with music flow?

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