Matched context for ppm and nitrogen

The page lists matched contexts for ppm and nitrogen.

Share - ppm	Share - nitrogen	Phrase
2.18%	29.61%	{ppm or nitrogen} oxide
3.25%	2.02%	{ppm or nitrogen} monoxide
2.20%	2.46%	{ppm or nitrogen} content
6.18%	0.91%	ppm {ppm or nitrogen}
1.02%	1.22%	contain {ppm or nitrogen} [perform operation]
0.47%	0.22%	{ppm or nitrogen} air
0.69%	0.59%	{ppm or nitrogen} concentration
2.05%	0.14%	{ppm or nitrogen} contain
1.75%	0.40%	{ppm or nitrogen} hydrocarbon
0.59%	0.29%	{ppm or nitrogen} level
1.54%	0.40%	{ppm or nitrogen} nox
0.46%	0.05%	amount {ppm or nitrogen}
1.89%	0.16%	less [degree] {ppm or nitrogen}