Appox. usage (any sense): 4.68 per million words
Appox. usage (any sense): 31.7 per million words
Appox. usage (any sense): 9.5 per million words
Appox. usage (any sense): 0.922 per million words
Appox. usage (any sense): 1.71 per million words
Appox. usage (any sense): less than 0.1 per million words