Matched context for obstruction and irregularity

The page lists matched contexts for obstruction and irregularity.

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