Matched context for irregularity and obstruction

The page lists matched contexts for irregularity and obstruction.

Share - irregularity	Share - obstruction	Phrase
13.42%	15.17%	encounter {irregularity or obstruction} [perform operation]
11.37%	1.84%	road {irregularity or obstruction}
1.61%	2.72%	detect {irregularity or obstruction} [perform operation]
1.29%	1.10%	cause {irregularity or obstruction} [perform operation]
0.60%	1.15%	not {irregularity or obstruction}