Usage History of 'refugia'

The following chart shows how frequently 'refugia' appeared in printed materials over time. For example, the word 'refugia' occurred 1 time in books in 1725 and 2,836 times in 2008. From 1725 to 2008, the word 'refugia' was used a total of 74,293 times in books scanned by Google. See Reference: Google Ngram project.

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