Matched context for obstacle and knocking

The page lists matched contexts for obstacle and knocking.

Share - obstacle	Share - knocking	Phrase
5.64%	5.47%	detect {obstacle or knocking} [perform operation]
3.44%	1.23%	avoid {obstacle or knocking} [perform operation]
1.36%	2.16%	{obstacle or knocking} sensor
1.61%	0.69%	{obstacle or knocking} detector
2.09%	0.52%	{obstacle or knocking} presence
0.92%	1.00%	{obstacle or knocking} detection
1.19%	0.09%	{obstacle or knocking} means
0.64%	0.52%	{obstacle or knocking} [does] cause
0.94%	0.85%	not {obstacle or knocking}
0.91%	1.08%	sense {obstacle or knocking} [perform operation]