Google Books Ngram Viewer

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

1900 - 1928 1929 - 1957 1958 - 1962 1963 - 1992 1993 - 2000 changed roles English
1900 - 1946 1947 - 1974 1975 - 1976 1977 - 1995 1996 - 2000 change roles English
1900 - 1961 1962 - 1992 1993 - 1995 1996 - 1997 1998 - 2000 changing roles English
1900 - 1968 1969 1970 - 1978 1979 - 1992 1993 - 1995 changes roles English

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