Matched context for unstable and irregular

The page lists matched contexts for unstable and irregular.

Share - unstable	Share - irregular	Phrase
22.90%	4.96%	{unstable or irregular} [time periodicity] become
9.06%	10.60%	{unstable or irregular} [time periodicity] combustion
5.56%	8.70%	{unstable or irregular} [time periodicity] condition
0.43%	1.88%	{unstable or irregular} [time periodicity] engine