Matched context for reciprocate and stroke

The page lists matched contexts for reciprocate and stroke.

Share - reciprocate	Share - stroke	Phrase
12.57%	10.08%	piston [does] {reciprocate or stroke}
4.80%	21.58%	{reciprocate or stroke} piston [perform operation]
3.26%	8.03%	{reciprocate or stroke} plunger [perform operation]
0.20%	3.30%	chamber {reciprocate or stroke}