Matched context for weaken and impede

The page lists matched contexts for weaken and impede.

Share - weaken	Share - impede	Phrase
8.52%	8.27%	{weaken or impede} motion [perform operation]
3.76%	16.89%	{weaken or impede} flow [perform operation]
2.09%	8.44%	not {weaken or impede}
4.29%	2.00%	{weaken or impede} modal could
3.27%	1.52%	{weaken or impede} modal can
1.71%	2.62%	{weaken or impede} modal will
1.36%	0.63%	{weaken or impede} modal may