Appox. usage (any sense): 66.9 per million words
Appox. usage (any sense): 13 per million words
Appox. usage (any sense): 0.721 per million words
Appox. usage (any sense): 3.64 per million words
Appox. usage (any sense): 0.583 per million words
Appox. usage (any sense): 0.012 per million words