How many season have an average attendance league of 2.456?
CREATE TABLE table_78659 (
    "Season" real,
    "Average Attendance Home" real,
    "Highest Attendance Home" text,
    "Average Attendance Away" real,
    "Highest Attendance Away" text,
    "Division / Section" text,
    "Level" text,
    "Average Attendance League" real
)
SELECT SUM("Season") FROM table_78659 WHERE "Average Attendance League" = '2.456'
Below are sql tables schemas paired with instruction that describes a task. Using valid SQLite, write a response that appropriately completes the request for the provided tables. ### Instruction: How many season have an average attendance league of 2.456? ### Input: CREATE TABLE table_78659 (
    "Season" real,
    "Average Attendance Home" real,
    "Highest Attendance Home" text,
    "Average Attendance Away" real,
    "Highest Attendance Away" text,
    "Division / Section" text,
    "Level" text,
    "Average Attendance League" real
) ### Response: SELECT SUM("Season") FROM table_78659 WHERE "Average Attendance League" = '2.456'