Matched context for unblock and shut

The page lists matched contexts for unblock and shut.

Share - unblock	Share - shut	Phrase
13.84%	12.23%	{unblock or shut} port [perform operation]
5.48%	15.45%	{unblock or shut} passage [perform operation]
3.39%	15.43%	valve [does] {unblock or shut}
4.53%	1.42%	means [does] {unblock or shut}