CREATE TABLE table_16760 ("Race Name" TEXT, "Circuit" TEXT, "Date" TEXT, "Winning driver" TEXT, "Constructor" TEXT, "Report" TEXT)

What is the total amount of circuts dated 22 april?
SELECT COUNT("Circuit") FROM table_16760 WHERE "Date" = '22 April'
SELECT COUNT("Circuit") FROM "table_16760" WHERE "Date" = '22 April'