Appox. usage (any sense): 53 per million words
Appox. usage (any sense): 4.04 per million words
Appox. usage (any sense): 0.946 per million words
Appox. usage (any sense): 0.459 per million words
Appox. usage (any sense): 0.033 per million words
Appox. usage (any sense): less than 0.1 per million words