Usage History of 'ommatidium'

The following chart shows how frequently 'ommatidium' appeared in printed materials over time. For example, the word 'ommatidium' occurred 258 times in books in 1866 and 732 times in 2008. From 1866 to 2008, the word 'ommatidium' was used a total of 49,535 times in books scanned by Google. See Reference: Google Ngram project.

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