Usage History of 'heliographed'

The following chart shows how frequently 'heliographed' appeared in printed materials over time. For example, the word 'heliographed' occurred 2 times in books in 1856 and 263 times in 2008. From 1856 to 2008, the word 'heliographed' was used a total of 3,455 times in books scanned by Google. See Reference: Google Ngram project.

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