Matched context for environment and cleanliness

The page lists matched contexts for environment and cleanliness.

Share - environment	Share - cleanliness	Phrase
0.48%	31.67%	engine {environment or cleanliness}
0.35%	16.69%	maintain {environment or cleanliness} [perform operation]
0.91%	5.47%	high [size] {environment or cleanliness}
0.30%	13.68%	improve {environment or cleanliness} [perform operation]