Google Books Ngram Viewer

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

1700 - 1771 1772 - 1916 1917 - 1936 1937 - 1958 1959 - 2000 fortnight English
1700 - 1834 1835 - 1975 1976 - 1983 1984 - 1991 1992 - 2000 two weeks English

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