Matched context for shift back and change over

The page lists matched contexts for shift back and change over.

Share - shift back	Share - change over	Phrase
40.91%	15.03%	position [connection] {shift back or change over}
26.96%	15.87%	{shift back or change over} valve [perform operation]
32.12%	6.38%	position [location] {shift back or change over}