Usage History of 'achromatic'

The following chart shows how frequently 'achromatic' appeared in printed materials over time. For example, the word 'achromatic' occurred 2 times in books in 1764 and 10,360 times in 2008. From 1764 to 2008, the word 'achromatic' was used a total of 405,885 times in books scanned by Google. See Reference: Google Ngram project.

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