Usage History of 'preprograms'

The following chart shows how frequently 'preprograms' appeared in printed materials over time. For example, the word 'preprograms' occurred 2 times in books in 1919 and 12 times in 2008. From 1919 to 2008, the word 'preprograms' was used a total of 831 times in books scanned by Google. See Reference: Google Ngram project.

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