Matched context for dirt and contamination

The page lists matched contexts for dirt and contamination.

Share - dirt	Share - contamination	Phrase
8.38%	7.99%	prevent {dirt or contamination} [perform operation]
4.55%	7.83%	protect from {dirt or contamination}
7.64%	1.87%	remove {dirt or contamination} [perform operation]
0.40%	0.54%	not {dirt or contamination}