Appox. usage (any sense): less than 0.1 per million words
Appox. usage (any sense): 15.2 per million words
Appox. usage (any sense): less than 0.1 per million words
Appox. usage (any sense): less than 0.1 per million words
Appox. usage (any sense): 15.2 per million words
Appox. usage (any sense): less than 0.1 per million words