Google Books Ngram Viewer

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

1800 - 1834 1835 - 1956 1957 - 1965 1966 - 1981 1982 - 2000 union flag English
1800 - 1877 1878 - 1932 1933 - 1942 1943 - 1981 1982 - 2000 union jack English

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