Appox. usage (any sense): 2.6 per million words
Appox. usage (any sense): 0.453 per million words
Appox. usage (any sense): 2.08 per million words
Appox. usage (any sense): 0.045 per million words
Appox. usage (any sense): less than 0.1 per million words
Appox. usage (any sense): 0.71 per million words