I am trying to find 1870 census with william oscar frazier b 1855 ohio help?

I don't understand what kind of help you need. You can go to your library or a Family History Center through the Latter Day Saints and do some census searching. If you can't find your ancestor in 1870, try the 1880, 1900, 1910, 1920, 1930. Sometimes , ancestors don't show up in some of the census records. Good luck