Appox. usage (any sense): 29.7 per million words
Appox. usage (any sense): 33.7 per million words
Appox. usage (any sense): 39.4 per million words
Appox. usage (any sense): 7.88 per million words
Appox. usage (any sense): 6.82 per million words
Appox. usage (any sense): 0.054 per million words