Usage History of 'harboring'

The following chart shows how frequently 'harboring' appeared in printed materials over time. For example, the word 'harboring' occurred 2 times in books in 1593 and 27,555 times in 2008. From 1593 to 2008, the word 'harboring' was used a total of 579,638 times in books scanned by Google. See Reference: Google Ngram project.

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