Answer:
5. Visitar en un año.
Step-by-step explanation:
This is a typical visit to have your teeth cleaned by the dentist. We all know ¨El ratoncito Peréz¨ is the latin version of the tooth fairy, the riddle is about a routine we all need to practice at least once a year, so that we keep it up with our oral health. So remember: try to visit the dentist at least once a year, in the meantime use floss and take your time brushing your teeth. ;)