You would need to eat the seeds of SEVERAL HUNDRED apples in one sitting, and you would need to grind them up finely beforehand to get full amygdalin absorption.

We're talking about almost a cup, or 100+ grams of apple seed here.

Your body continually neutralizes cyanide with the enzyme rhodanese, so there's also no danger of cyanide accumulation from eating a few apples a day.

I don't know if my father-in-law spit out the seeds or not. I'd heard the cyanide thing as a kid and always avoided eating them.