During 120 throws of a fair die, a student forgot to note the number of times the face "6" appeared. The recorded frequencies are: 1: 18 times, 2: 20 times, 3: 25 times, 4: 19 times, 5: 22 times. How many times did the face "6" appear?
a) 18
b) 16
c) 20
d) 22