Cách sử dụng
The word 'frequency' refers to how often something happens. For example, you can use the word 'frequency' when talking about how often you exercise, how often you eat certain foods, or how often you see your friends. It is also used in science to talk about things like radio signals and sound waves. So, if you are an English learner, you might use the word 'frequency' to ask someone how often they do something or to describe how often you do something yourself.