How often do you ~~

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Across
  1. 2. a part of the inside of a building
  2. 4. sport through water by moving your arms and legs
  3. 6. a period of seven days
  4. 8. the first meal of the day
  5. 9. improve your health or physical fitness
  6. 10. helpful result or effect
  7. 14. not sick or injured, well
  8. 15. free from dirt
  9. 16. one time only
  10. 18. white objects inside the mouth that are used for biting
Down
  1. 1. to take a liquid into your mouth and swallow it
  2. 3. to a greater or extent
  3. 5. an act of cleaning something by using water
  4. 7. 7 days in a week
  5. 8. to clean or smooth with it
  6. 11. many times
  7. 12. 24 hours
  8. 13. to rest your body by closing your eyes
  9. 17. to take food into your mouth and swallow it