Google Books Ngram Viewer

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

1800 - 1884 1885 - 1915 1916 - 1924 1925 - 1988 1989 - 2008 union jack English
1800 - 1847 1848 - 1863 1864 - 1875 1876 - 1980 1981 - 2008 union flag English

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