Matched context for collapse and expulsion

The page lists matched contexts for collapse and expulsion.

Share - collapse	Share - expulsion	Phrase
6.45%	13.56%	prevent {collapse or expulsion} [perform operation]
4.09%	13.16%	{collapse or expulsion} stroke
2.49%	7.37%	cause {collapse or expulsion} [perform operation]
1.73%	7.09%	permit {collapse or expulsion} [perform operation]