Appox. usage (any sense): 21.3 per million words
Appox. usage (any sense): 11.6 per million words
Appox. usage (any sense): 9.32 per million words
Appox. usage (any sense): 2.17 per million words
Appox. usage (any sense): 0.724 per million words
Appox. usage (any sense): 1.03 per million words