Usage History of 'allograph'

The following chart shows how frequently 'allograph' appeared in printed materials over time. For example, the word 'allograph' occurred 2 times in books in 1813 and 135 times in 2008. From 1813 to 2008, the word 'allograph' was used a total of 6,283 times in books scanned by Google. See Reference: Google Ngram project.

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