CREATE TABLE table_name_48 (subframe__number INTEGER, bits VARCHAR)
SELECT SUM(subframe__number) FROM table_name_48 WHERE bits = "18–22"
จำนวนเฟรมย่อยทั้งหมดที่มีบิต 18–22 คือเท่าใด
What is the total subframe count with Bits of 18–22?