Google Books Ngram Viewer

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

1780 - 1805 1806 - 1827 1828 - 1829 1830 - 1838 1839 - 1840 do the necessary English
1780 - 1794 1795 - 1826 1827 - 1828 1829 - 1837 1838 - 1840 do the needful English

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