Usage History of 'subprograms'

The following chart shows how frequently 'subprograms' appeared in printed materials over time. For example, the word 'subprograms' occurred 4 times in books in 1924 and 4,932 times in 2008. From 1924 to 2008, the word 'subprograms' was used a total of 247,017 times in books scanned by Google. See Reference: Google Ngram project.

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