Usage History of 'portable'

The following chart shows how frequently 'portable' appeared in printed materials over time. For example, the word 'portable' occurred 2 times in books in 1579 and 212,141 times in 2008. From 1579 to 2008, the word 'portable' was used a total of 5,237,341 times in books scanned by Google. See Reference: Google Ngram project.

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