Google Books Ngram Viewer

Graph these comma-separated phrases:
case-insensitive
between and from the corpus with smoothing of .  
Search in Google Books:

1500 - 1647 1648 - 1709 1710 - 1712 1713 - 1812 1813 - 2008 ringleader English

Run your own experiment! Raw data is available for download here.
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