Matched context for premixture and stratum

The page lists matched contexts for premixture and stratum.

Share - premixture	Share - stratum	Phrase
4.52%	20.79%	air-fuel {premixture or stratum}
3.86%	6.16%	form {premixture or stratum} [perform operation]
4.31%	4.80%	air {premixture or stratum}