Appox. usage (any sense): 6200 per million words
Appox. usage (any sense): 2550 per million words
Appox. usage (any sense): 1350 per million words
Appox. usage (any sense): 386 per million words
Appox. usage (any sense): 56.8 per million words
Appox. usage (any sense): 41.7 per million words