Concordance for noun opening/closing

The page lists top contexts for noun opening/closing and their percentages (as applied to automotive subject domain).

Share	Phrase
24.81%	opening/closing valve
18.57%	atmosphere opening/closing
9.79%	opening/closing means
8.52%	opening/closing component
7.17%	opening/closing timing
6.46%	opening/closing operation
5.89%	door opening/closing
4.92%	valve opening/closing
4.68%	control opening/closing [perform operation]
4.59%	passage opening/closing
4.53%	opening/closing control