It first appeared in the American English dictionary in the 1950s, and "choreographer" was first used as a credit for
How did choreography begin?
The composition of dance is creative in the same way in which the composition of music is. ... In the 16th century, dance masters at the French court so organized the floor patterns and theatrical and artistic contexts of their social dances as to initiate a choreographic form, the ballet de cour.
Who is the first choreographer in the world?
Martha Graham created a dance technique that became the first significant alternative to the idiom of classical ballet.