Conversation so far:
What was Vaudeville?
Vaudeville is a theatrical genre of variety entertainment born in France at the end of the 19th century.
What was Bill Robinson's role in Vaudeville?
By 1912, Bill Robinson was a full partner in the duo, which had become primarily a tap dancing act, booked on both the Keith and Orpheum Circuits.
Did Vaudeville see any success?
Bill Robinson matured and began working as a solo act, increasing his earnings to an estimated $3,500 per week.
How long did Bill Robinson perform solo?
What was Bill Robinson's act about?
Are there any other interesting aspects about Bill Robinson?
Bill Robinson was one of the first performers to break vaudeville's two-colored rule, which forbade solo black acts.. 943–944
Where did Bill Robinson perform for the troops?
Bill Robinson performed at the various training camps the troops were stationed at.
Did Bill Robinson do anything else with Vaudeville?
Throughout the early 1920s, Bill Robinson continued his career on the road as a solo vaudeville act, touring throughout the country and most frequently visiting Chicago.

Question: How many solo performances did he have?
Self-contained rewrite: How many solo performances did Bill Robinson have?