CREATE TABLE table_56791 ("Debut year" FLOAT, "Player" TEXT, "Date of birth" TEXT, "Games" FLOAT, "Goals" FLOAT, "Years at club" TEXT)

How many games for keith j. miller, who debuted after 1974 with less than 1 goal?
SELECT AVG("Games") FROM table_56791 WHERE "Goals" < '1' AND "Player" = 'keith j. miller' AND "Debut year" > '1974'
SELECT AVG("Games") FROM "table_56791" WHERE "Debut year" > '1974' AND "Goals" < '1' AND "Player" = 'keith j. miller'