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 - 1937 1938 - 1946 1947 - 1989 1990 - 2008 union jack English
1800 - 1835 1836 - 1952 1953 - 1956 1957 - 1988 1989 - 2008 union flag English

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