Usage History of 'femtosecond'

The following chart shows how frequently 'femtosecond' appeared in printed materials over time. For example, the word 'femtosecond' occurred 4 times in books in 1964 and 8,646 times in 2008. From 1964 to 2008, the word 'femtosecond' was used a total of 148,291 times in books scanned by Google. See Reference: Google Ngram project.

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