Matched context for ineffective and useful

The page lists matched contexts for ineffective and useful.

Share - ineffective	Share - useful	Phrase
15.71%	0.63%	{ineffective or useful} [effectiveness] fuel
3.25%	1.15%	{ineffective or useful} [effectiveness] system
2.32%	0.79%	{ineffective or useful} [effectiveness] catalyst
0.92%	1.58%	{ineffective or useful} [effectiveness] it
5.46%	0.27%	{ineffective or useful} [effectiveness] means
1.02%	0.60%	{ineffective or useful} [effectiveness] device
3.82%	0.18%	{ineffective or useful} [effectiveness] stroke
1.06%	0.32%	{ineffective or useful} [effectiveness] valve