CREATE TABLE table_66242 ("Debut year" FLOAT, "Player" TEXT, "Games" FLOAT, "Goals" FLOAT, "Years at club" TEXT)

Which Games have Years at club of 1974 1975, and Goals of 4?
SELECT AVG("Games") FROM table_66242 WHERE "Years at club" = '1974–1975' AND "Goals" = '4'
SELECT AVG("Games") FROM "table_66242" WHERE "Goals" = '4' AND "Years at club" = '1974–1975'