It's the problem of continuous liquid fuel accumulating in the cylinders, thereby requiring that much more heat to fire.

Your best hope to start is in the initial 1-5 seconds. The prospects deteriorate based upon time.......not the number of attempts.

The deterioration with time is offset by the increase in the temperature of the cylinder due to repeated compression strokes.

Additionally, the deterioration with time is caused by decreasing battery voltage, thereby resulting in reduced crank speed and subsequently lower compression.

It's an interesting dynamic.