Appox. usage (any sense): 108 per million words
Appox. usage (any sense): 14.8 per million words
Appox. usage (any sense): 3.36 per million words
Appox. usage (any sense): 0.583 per million words
Appox. usage (any sense): 0.517 per million words
Appox. usage (any sense): less than 0.1 per million words