Appox. usage (any sense): 3000 per million words
Appox. usage (any sense): 107 per million words
Appox. usage (any sense): 1570 per million words
Usage unknown
Appox. usage (any sense): less than 0.1 per million words
Appox. usage (any sense): 0.036 per million words
Appox. usage (any sense): less than 0.1 per million words