Google Books Ngram Viewer

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

1960 - 1966 1967 - 1984 1985 - 1987 1988 - 2002 2003 - 2008 duchess of windsor English
1960 - 1969 1970 - 1978 1979 1980 - 2002 2003 - 2008 wallis simpson English

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