Usage History of 'calciferols'

The following chart shows how frequently 'calciferols' appeared in printed materials over time. For example, the word 'calciferols' occurred 1 time in books in 1846 and 45 times in 2008. From 1846 to 2008, the word 'calciferols' was used a total of 2,331 times in books scanned by Google. See Reference: Google Ngram project.

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