Usage History of 'libriform'

The following chart shows how frequently 'libriform' appeared in printed materials over time. For example, the word 'libriform' occurred 2 times in books in 1845 and 170 times in 2008. From 1845 to 2008, the word 'libriform' was used a total of 14,578 times in books scanned by Google. See Reference: Google Ngram project.

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