Complete the eccentric inventor's chaotic lab report by choosing the correct word for each gap.

The new robot holds a laser blaster in each hand, which makes it look very intimidating. Unfortunately, a glitch makes the machine beep loudly every five seconds while playing disco music.

The new robot holds a laser blaster in each hand, which makes it look very intimidating. Unfortunately, a glitch makes the machine beep loudly every five seconds while playing disco music.

Use each when talking about two things (like a pair of hands). Every is only used for groups of three or more. Both cannot be used here because "hand" is singular.

Use every with plural time expressions to describe how often something happens (e.g., every five seconds, every two weeks). We do not use "each" for this kind of frequency.