Matched context for retreat and descend

The page lists matched contexts for retreat and descend.

Share - retreat	Share - descend	Phrase
4.17%	19.34%	piston [does] {retreat or descend}
3.03%	2.54%	{retreat or descend} to start
2.64%	2.53%	{retreat or descend} piston [perform operation]
1.86%	1.78%	rapidly [manner] {retreat or descend}
1.28%	1.74%	{retreat or descend} modal can