The 1920 US Census still shows Frank and his family living at 900 Fratney St. Just their youngest son, Frank, and youngest daughter, Agnes, are still living with them. Though, if you look closely, they still live with three of their daugthers. Their daughter Francis and her husband are living in the same building. Also, their daughter, Mary and her husband are living in the “rear” of the house. Thirdly, another daughter, Helen and her husband live with Mary. Another great example of a Polish flat The Polish families tended to stay near each other, as I assume was similar with a lot of immigrant families.
I can’t make out Frank’s occupation, but it does look to say he works at “City Parks.”