Appox. usage (any sense): 19.4 per million words
Appox. usage (any sense): 1.69 per million words
Appox. usage (any sense): 1.05 per million words
Appox. usage (any sense): 0.159 per million words
Appox. usage (any sense): 0.117 per million words
Appox. usage (any sense): less than 0.1 per million words