Matched context for preferred and inefficient

The page lists matched contexts for preferred and inefficient.

Share - preferred	Share - inefficient	Phrase
0.09%	23.67%	{preferred or inefficient} [effectiveness] operation
0.33%	7.81%	{preferred or inefficient} [effectiveness] system
0.03%	9.10%	{preferred or inefficient} [effectiveness] engine
0.06%	6.07%	{preferred or inefficient} [effectiveness] use