Google Books Ngram Viewer

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

1900 - 1937 1938 - 1980 1981 - 1984 1985 - 2000 2001 - 2008 inflation English
1900 - 1931 1932 - 1983 1984 - 1989 1990 - 1996 1997 - 2008 unemployment English
1900 - 1919 1920 - 1986 1987 - 1993 1994 - 2000 2001 - 2008 crisis English

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