Final answer:
The question lacks context to determine how many years Judy was Assistant Choreographer, hence an accurate answer cannot be provided without additional information.
Step-by-step explanation:
The question "How many years was Judy Assistant Choreographer?" does not provide enough context or reference to accurately determine the number of years Judy served as an Assistant Choreographer. Without specific details about the subject matter of the question, such as a reference to a particular play, movie, or a real-life individual named Judy, it's not possible to provide an accurate answer. This type of question could be related to a reading assignment, film study, or biography that gives details about Judy's career in choreography.