How often does it happen?

How often something happens depends on how many times it shows up in a certain amount of time.

Imagine you have a bag full of marbles, some are red, and some are blue. If you take out one marble every minute, how often you get a red marble depends on how many red marbles there are compared to the total number of marbles.

If half the marbles are red, you might get a red one about every other time, that’s like getting a red marble once in two tries. If only 1 out of 10 marbles is red, then it happens less often, maybe once in 10 tries.

You can think of this same idea with things you do every day. If your favorite song plays every 5 minutes on the radio, that means it happens once every 5 minutes. Or if your friend visits you 3 times a week, then they come three times in seven days.

It's all about counting how many times something shows up in a certain time or space, and that tells you how often it happens!