Appox. usage (any sense): 13.5 per million words
Appox. usage (any sense): 0.183 per million words
Usage unknown
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): less than 0.1 per million words
Appox. usage (any sense): 4.96 per million words