Usage History of 'planetoids'

The following chart shows how frequently 'planetoids' appeared in printed materials over time. For example, the word 'planetoids' occurred 6 times in books in 1821 and 1,211 times in 2008. From 1821 to 2008, the word 'planetoids' was used a total of 34,563 times in books scanned by Google. See Reference: Google Ngram project.

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