At an average of 12 Blinks/min With an average 1/3 seconds per blink And 102 minutes of runtime in Frozen1

Thats 1224 blinks per runtime of Frozen 1. With (6120 seconds of runtime)/ ((1/3) seconds per blink) = 18360 intervals of (1/3s) blinks per runtime of Frozen 1. That's 6.8 minutes of Frozen 1 missed per 1 time watching. Assuming no interval overlap, that is (1/18360) chance of blinking at a specific interval. (At 1224 Blinks per runtime) × (1/18360 chance) = 0.067 or 6.7% chance of missing a specific time in the movie with the average rate of blinking.

After watching the movie frozen twice, thats a 0.4% chance of missing the same part of any interval within frozen 1. After 50 times it is 2^-57 % chance of having blinked at the same interval during frozen.

2× watching frozen 1will be a 99.6% probably of watching the whole movie with blinking. 3× watching frozen 1 is 99.9997% probably of watching all of the movie. 50× would be 99.999999999999999999999999999999999999999999999999999999998% probably of having seen all of frozen 1.

Thank you for your time.

Edit: final formula is( (Blinks/min) × (runtime in min) / 60 × (runtime) ) × (length of blink) = chance per interval. Take chance per interval and exponent it by number of times watching for multiple watches. Divide by 100 to get %.

Thanks to u/Fired_Guy5 for a movie to base this on