CREATE TABLE table_72391 ("District" TEXT, "Incumbent" TEXT, "Party" TEXT, "First elected" FLOAT, "Result" TEXT, "Candidates" TEXT)

How many incumbents were for district georgia 6?
SELECT COUNT("Incumbent") FROM table_72391 WHERE "District" = 'Georgia 6'
SELECT COUNT("Incumbent") FROM "table_72391" WHERE "District" = 'Georgia 6'