Usage History of 'ammonium'

The following chart shows how frequently 'ammonium' appeared in printed materials over time. For example, the word 'ammonium' occurred 1 time in books in 1658 and 115,110 times in 2008. From 1658 to 2008, the word 'ammonium' was used a total of 5,152,694 times in books scanned by Google. See Reference: Google Ngram project.

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