Matched context for effective and inefficient

The page lists matched contexts for effective and inefficient.

Share - effective	Share - inefficient	Phrase
0.90%	23.67%	{effective or inefficient} [effectiveness] operation
1.27%	7.81%	{effective or inefficient} [effectiveness] system
0.45%	15.91%	{effective or inefficient} [effectiveness] combustion
0.61%	6.07%	{effective or inefficient} [effectiveness] use
0.51%	4.92%	very {effective or inefficient}