It has been estimated that Ellen G. White had 2000 visions and prophetic dreams. See the link:
http://ellenwhite.org/content/file/how-many-dreams-and-visions-did-ellen-g-white-have#document
See Comprehensive Index to the Writings of Ellen G. White vol. 3, pp. 2978-2984 for an extended list of her published visions, and prophetic dreams, noting time, places and topic.