Appox. usage (any sense): 19 per million words
Appox. usage (any sense): 2.04 per million words
Appox. usage (any sense): 0.216 per million words
Appox. usage (any sense): 1.38 per million words
Appox. usage (any sense): 2.13 per million words
Appox. usage (any sense): less than 0.1 per million words