Matched context for return back and drain back

The page lists matched contexts for return back and drain back.

Share - return back	Share - drain back	Phrase
12.32%	16.74%	tank [location] {return back or drain back}
13.45%	9.97%	tank [connection] {return back or drain back}
2.07%	22.43%	oil [does] {return back or drain back}
5.44%	7.46%	{return back or drain back} fuel [perform operation]
1.43%	4.42%	{return back or drain back} modal will