Google Books Ngram Viewer

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

1800 - 1806 1807 - 1812 1813 - 1817 1818 - 1931 1932 - 2008 endeavour English
1800 - 1823 1824 - 1858 1859 - 1871 1872 - 1967 1968 - 2008 endeavor English

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