Usage History of 'apteria'

The following chart shows how frequently 'apteria' appeared in printed materials over time. For example, the word 'apteria' occurred 4 times in books in 1766 and 50 times in 2008. From 1766 to 2008, the word 'apteria' was used a total of 5,993 times in books scanned by Google. See Reference: Google Ngram project.

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