Google Books Ngram Viewer

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

1540 - 1679 1680 - 1836 1837 - 1861 1862 - 1966 1967 - 2008 liberté French

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