Appox. usage (any sense): 31.5 per million words
Appox. usage (any sense): 15.3 per million words
Appox. usage (any sense): 2.5 per million words
Appox. usage (any sense): 1.74 per million words
Appox. usage (any sense): 0.21 per million words
Appox. usage (any sense): less than 0.1 per million words