Today's phrase is "How often".
This means how many times each day, week, year, etc.
Example 1
Doctor: Take these tablets.
Patient: How often?
Doctor: Three times a day.
Example 2
A. My sister lives in Tokyo.
B. Cool! How often do you see her?
A. About once a year.
Example 3
A. I'm taking Japanese lessons.
B. How often are your classes?
A. Twice a week.