Matched context for zero and guard

The page lists matched contexts for zero and guard.

Share - zero	Share - guard	Phrase
3.86%	12.18%	{zero or guard} at step
3.46%	7.22%	value [does] {zero or guard}
1.19%	5.50%	step [manner] {zero or guard}
0.37%	2.76%	{zero or guard} value [perform operation]