Matched context for nitrite and fluoride

The page lists matched contexts for nitrite and fluoride.

Share - nitrite	Share - fluoride	Phrase
3.43%	5.74%	calcium {nitrite or fluoride}
3.58%	3.68%	strontium {nitrite or fluoride}
3.19%	3.75%	barium {nitrite or fluoride}
3.16%	3.71%	magnesium {nitrite or fluoride}