Matched context for inversion and perturbation

The page lists matched contexts for inversion and perturbation.

Share - inversion	Share - perturbation	Phrase
4.21%	4.23%	{inversion or perturbation} frequency
1.02%	11.25%	{inversion or perturbation} control
1.94%	5.85%	ratio {inversion or perturbation}
1.48%	4.00%	{inversion or perturbation} [does] occur
0.81%	3.40%	{inversion or perturbation} means
1.11%	2.26%	{inversion or perturbation} number
0.22%	3.81%	cause {inversion or perturbation} [perform operation]