CREATE TABLE table_74757 ("Home team" TEXT, "Home team score" TEXT, "Away team" TEXT, "Away team score" TEXT, "Venue" TEXT, "Crowd" FLOAT, "Date" TEXT)

What is the listed crowd when essendon is the away squad?
SELECT COUNT("Crowd") FROM table_74757 WHERE "Away team" = 'essendon'
SELECT COUNT("Crowd") FROM "table_74757" WHERE "Away team" = 'essendon'