Matched context for vref and vso

The page lists matched contexts for vref and vso.

Share - vref	Share - vso	Phrase
4.47%	41.89%	estimated [certainty] {vref or vso}
17.04%	4.83%	reference {vref or vso}
14.03%	3.77%	voltage {vref or vso}
2.67%	19.47%	speed {vref or vso}
2.07%	14.95%	vehicle {vref or vso}
1.56%	5.42%	calculate {vref or vso} [perform operation]