Final answer:
The correct answer is B, referring to how many times per week a person exercises. Frequency is also used in physics to describe the number of waves passing a point per second and in general statistics for how often a value appears in a dataset.
Step-by-step explanation:
Frequency in the context of a workout or exercise routine typically refers to how often a person engages in physical activity. So, the correct answer to the student's question is B: how many times per week a person exercises. This aspect of a fitness routine is essential for planning and measuring progress.
However, the term frequency is also used in other subjects such as Physics, where it refers to the number of oscillations or waves that occur per unit of time, measured in hertz (Hz). In general statistics, frequency denotes how often a certain value appears in a data set.
When discussing sound, the term frequency can be misunderstood. It's important to note that frequency is related to the pitch of the sound, not the loudness, which is measured in decibels (dB).