Usage History of 'echolocation'

The following chart shows how frequently 'echolocation' appeared in printed materials over time. For example, the word 'echolocation' occurred 2 times in books in 1928 and 4,564 times in 2008. From 1928 to 2008, the word 'echolocation' was used a total of 119,842 times in books scanned by Google. See Reference: Google Ngram project.

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