Appox. usage (any sense): 52.8 per million words
Appox. usage (any sense): 44.4 per million words
Appox. usage (any sense): 11 per million words
Appox. usage (any sense): 0.754 per million words
Appox. usage (any sense): 0.258 per million words
Appox. usage (any sense): less than 0.1 per million words