Matched context for constrict and block off

The page lists matched contexts for constrict and block off.

Share - constrict	Share - block off	Phrase
10.92%	3.72%	{constrict or block off} flow [perform operation]
5.20%	4.30%	{constrict or block off} chamber [perform operation]
5.59%	2.60%	{constrict or block off} passage [perform operation]
6.23%	1.80%	{constrict or block off} end [perform operation]