CREATE TABLE table_15681686_4 (rank__timeslot_ VARCHAR, viewers__millions_ VARCHAR)

what is the total number of rank where viewers is 9.38?
SELECT COUNT(rank__timeslot_) FROM table_15681686_4 WHERE viewers__millions_ = "9.38"
SELECT COUNT("rank__timeslot_") FROM "table_15681686_4" WHERE "9.38" = "viewers__millions_"