2 to 5 business days
Some people simply prefer the keyboard as a more efficient input method. It requires less movement and effort than a mouse or other pointing device. Form filling, for example, is likely to involve typing for data entry, so if a mouse is required to move focus between fields, or to select specific data options, then efficiency is reduced and the user is more likely to get frustrated.
The keyboard works really well as an alternative input to point-and-click interaction. In addition to supporting the basic set of keyboard commands, screen readers also provide a complex set of keyboard commands. These commands give users a powerful additional set of tools to interact with web content more efficiently. The catch is that these commands can take users some time to learn and memorize and there are variations from one screen reader to another, so not all users may be familiar with them.