Appox. usage (any sense): 18.9 per million words
Appox. usage (any sense): 0.087 per million words
Appox. usage (any sense): 36 per million words
Appox. usage (any sense): 0.012 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