Google Books Ngram Viewer

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

1800 - 1895 1896 - 1898 1899 - 1969 1970 - 1995 1996 - 2000 ilr English
1800 - 1955 1956 - 1984 1985 - 1988 1989 - 1994 1995 - 2000 industrial and labor relations English

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