Google Books Ngram Viewer

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

1800 - 1937 1938 - 1945 1946 - 1948 1949 - 1993 1994 - 2000 fluctuates wildly English
1800 - 1937 1938 - 1968 1969 - 1972 1973 - 1991 1992 - 2000 fluctuates widely English

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