Complex sentence: In 1901, "Hoogie Boogie" appeared in the title of published sheet music, the first known instance where a redoubling of the word "Boogie" occurs in the title of published music.
Split into simpler sentences: In 1901, "Hoogie Boogie" appeared in the title of published sheet music. This is the first known instance where a redoubling of the word "Boogie" occurs in the title of published music.