Matched context for presence and concentration

The page lists matched contexts for presence and concentration.

Share - presence	Share - concentration	Phrase
3.48%	3.60%	detect {presence or concentration} [perform operation]
0.82%	13.71%	oxygen {presence or concentration}
2.35%	0.74%	sense {presence or concentration} [perform operation]
0.54%	2.22%	vapor {presence or concentration}
0.34%	0.16%	{presence or concentration} [does] increase
0.18%	0.26%	{presence or concentration} [does] indicate
0.47%	0.17%	air {presence or concentration}
0.27%	0.33%	combustion {presence or concentration}
0.36%	2.52%	component {presence or concentration}
0.48%	0.18%	compound {presence or concentration}
0.34%	0.28%	contaminant {presence or concentration}
1.56%	0.26%	determine {presence or concentration} [perform operation]
1.43%	0.41%	dye {presence or concentration}
0.32%	1.06%	fuel {presence or concentration}
0.48%	1.66%	gas {presence or concentration}
1.28%	0.33%	hydrocarbon {presence or concentration}
1.13%	0.28%	hydrogen {presence or concentration}
1.38%	0.26%	indicate {presence or concentration} [perform operation]
0.22%	0.49%	mixture {presence or concentration}
0.23%	0.27%	monitor {presence or concentration} [perform operation]
0.28%	0.20%	oil {presence or concentration}