Matched context for knocking and shortage

The page lists matched contexts for knocking and shortage.

Share - knocking	Share - shortage	Phrase
6.99%	6.22%	{knocking or shortage} [does] occur
5.47%	7.56%	detect {knocking or shortage} [perform operation]
2.77%	4.77%	prevent {knocking or shortage} [perform operation]
1.72%	7.12%	{knocking or shortage} state
1.90%	5.94%	cause {knocking or shortage} [perform operation]
0.35%	8.73%	{knocking or shortage} signal