Appox. usage (any sense): 460 per million words
Appox. usage (any sense): 65 per million words
Appox. usage (any sense): 17 per million words
Appox. usage (any sense): 7.33 per million words
Appox. usage (any sense): 0.742 per million words
Appox. usage (any sense): 0.71 per million words