The answer to that is 21 days exactly, although you need to bear in mind that this can vary, depending on a number of circumstances. Generally speaking however, fertile chicken eggs which are hatched out by a hen will take 21 days before you see little faces staring at you from underneath their mamma's wings.
In linguistics, a register is a variety of a language used for a particular purpose or in a particular social setting.
The definition of a plaintiff is someone who brings a lawsuit against someone into court. An example of a plaintiff is a wife filing for divorce. a person who brings a suit into a court of law; complainant.