Appox. usage (any sense): 10.5 per million words
Appox. usage (any sense): 1.6 per million words
Appox. usage (any sense): 0.487 per million words
Appox. usage (any sense): 0.273 per million words
Appox. usage (any sense): 0.015 per million words
Appox. usage (any sense): less than 0.1 per million words