Appox. usage (any sense): 40 per million words
Appox. usage (any sense): 4.29 per million words
Appox. usage (any sense): 2.29 per million words
Appox. usage (any sense): 2.03 per million words
Appox. usage (any sense): less than 0.1 per million words
Appox. usage (any sense): less than 0.1 per million words