Usage History of 'lactations'

The following chart shows how frequently 'lactations' appeared in printed materials over time. For example, the word 'lactations' occurred 4 times in books in 1658 and 484 times in 2008. From 1658 to 2008, the word 'lactations' was used a total of 31,902 times in books scanned by Google. See Reference: Google Ngram project.

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