Matched context for blockage and expulsion

The page lists matched contexts for blockage and expulsion.

Share - blockage	Share - expulsion	Phrase
3.81%	13.56%	prevent {blockage or expulsion} [perform operation]
2.36%	16.16%	fuel {blockage or expulsion}
3.95%	7.37%	cause {blockage or expulsion} [perform operation]
2.57%	3.43%	air {blockage or expulsion}