Matched context for fluoride and iodide

The page lists matched contexts for fluoride and iodide.

Share - fluoride	Share - iodide	Phrase
5.74%	4.43%	calcium {fluoride or iodide}
3.68%	5.27%	strontium {fluoride or iodide}
3.75%	4.70%	barium {fluoride or iodide}
3.71%	4.65%	magnesium {fluoride or iodide}