Google Books Ngram Viewer

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

1880 - 1949 1950 - 1973 1974 - 1977 1978 - 2000 2001 - 2008 organic solidarity English
1880 - 1956 1957 - 1990 1991 - 1994 1995 - 1999 2000 - 2008 mechanical solidarity English

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