Matched context for sustain and impair

The page lists matched contexts for sustain and impair.

Share - sustain	Share - impair	Phrase
11.64%	2.35%	{sustain or impair} combustion [perform operation]
3.55%	6.85%	{sustain or impair} operation [perform operation]
2.12%	7.83%	{sustain or impair} performance [perform operation]
0.53%	6.27%	not {sustain or impair}
0.98%	2.43%	{sustain or impair} modal will
1.31%	1.38%	{sustain or impair} modal can
1.42%	0.76%	force [does] {sustain or impair}
0.99%	0.89%	{sustain or impair} flow [perform operation]
0.39%	2.52%	{sustain or impair} modal may