The term FREQUENT TASTER can be solved by the four letter word CHEF. A CHEF is a professional cook who is responsible for the preparation and cooking of food in a restaurant or other food establishment. They are also responsible for creating new recipes and menu items, as well as managing kitchen staff. A frequent taster is someone who tastes food regularly to ensure that it meets the standards of quality and flavor. This could be a CHEF or someone else who is employed to taste food on a regular basis.