No, Frederick wasn't there on the 1901 census. He is at 17 Sidmouth Street, Reading, Berks. His occupation is described as a lithographic Printer, probably working for Huntley and Palmer, the biscuit manufactures. In 1908, he was still living at 17 Sidmouth Street, Reading, information from the death certificate for his wife Eliza Chinnery Douglass nee Wells.
You did , though give me the idea of looking up the address on the 1901 census. I found the occupant was an Edwin Hutchings and his occupation: newsagent, own account.
There were no results for the address for 1891. On the 1939 census it is still a Newsagent And Tobacconist, although not run by any of my family.
1918 Frederick Douglass was living at 75 Tranmere Road, Wandsworth
Frederick Douglass died 22/05/1919 • St. James Infirmary, Ouseley Road, Battersea, London.