On Friday May 27, 2005, the (9) was discontinued.
Started on August 21, 1989, the (1) and (9) provided skip-stop service on Broadway but only between West 242d Street-Van Cortlandt Park and 137th Street-City College.
Between 137th Street and South Ferry, (1) and (9) trains made all stops.
When introduced, (9) trains ran rush hours and middays until 1994 when service was shortened to rush hours only.
From Tuesday September 11, 2001 until September 15, 2002, (9) service was suspended. (1) trains ran West 242d Street-Van Cortlandt Park to 14th Street, runnin local to 96th Street and express to 14th Street until September 19, 2001 then West 242d Street-Van Cortlandt Park to New Lots Avenue
Intersting article on the (9) from Wednesday May 25, 2005: http://www.nytimes.com/2005/05/25/nyregion/25train.html