If a light flashes 1.42 times in one second, how long does it take for the light to flash only one time

This should be simple but my brain is making it way harder than it needs to be. This isn't a homework problem so don't worry, you're not giving me answers to an assignment. I'm doing my lab notebook for a Physics class where we used a strobe light to time a ball rolling down an incline. Every time the light flashed, we recorded the distance of the ball. Now I need to know the time between each flash and my mind is totally blanking. Any help would be greatly appreciated.

My question again: If a light flashes 1.42 times in one second, how long does it take for the light to flash only one time?

Thanks so much you guys.

1.42 = flashes / second

1/1.42 = seconds / flash

= 0.7 seconds / flash

Lambda or Period is inverse of frequency.
So, T = 1/f = 1/1.42 seconds.

Since the light flashes, it is on for half the time, so it flashes for 1/(1.42 x 2) = 1/2.84 seconds.

Ans: 0.3521 seconds.