I have a requirement for a web form (desktop) where user is asked to enter "Three Frequently Dialed Numbers (Last 30 days)". What would be the best way to handle this? Three different input fields or just one field and use comma or space to separate the numbers? Can you come up with any existing examples?
I would say definitively multiple fields. Using a form, it should be clear that in every field is just one number. If you use a separator the user has to learn which separator to use. It would be necessary to have an explanation text with the field.
Existing example: contacts on any mobile phone.