Google Books Ngram Viewer

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

1800 - 1887 1888 - 1942 1943 - 1951 1952 - 1986 1987 - 2008 union jack English
1800 - 1893 1894 - 1955 1956 - 1957 1958 - 1986 1987 - 2008 union flag English

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