CREATE TABLE table_2409 ("Episode" CLOB, "Broadcast date" CLOB, "Run time" CLOB, "Viewers  ( in millions ) " CLOB, "Archive" CLOB)

When 24:31 is the run time how many measurements of viewers (in millions) are there?
SELECT COUNT("Viewers (in millions)") FROM table_2409 WHERE "Run time" = '24:31'
SELECT COUNT("Viewers (in millions)") FROM "table_2409" WHERE "Run time" = '24:31'