Matched context for reversal and instability

The page lists matched contexts for reversal and instability.

Share - reversal	Share - instability	Phrase
11.95%	3.70%	{reversal or instability} frequency
8.17%	1.42%	flow {reversal or instability}
1.54%	5.57%	cause {reversal or instability} [perform operation]
2.15%	2.07%	{reversal or instability} [does] occur
1.04%	1.23%	pressure {reversal or instability}
0.82%	2.19%	prevent {reversal or instability} [perform operation]