Appox. usage (any sense): 70 per million words
Appox. usage (any sense): 29.8 per million words
Appox. usage (any sense): 0.565 per million words
Appox. usage (any sense): 0.135 per million words
Appox. usage (any sense): 0.111 per million words
Appox. usage (any sense): less than 0.1 per million words