Usage History of 'microliths'

The following chart shows how frequently 'microliths' appeared in printed materials over time. For example, the word 'microliths' occurred 4 times in books in 1827 and 2,493 times in 2008. From 1827 to 2008, the word 'microliths' was used a total of 107,399 times in books scanned by Google. See Reference: Google Ngram project.

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