Google Books Ngram Viewer

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

1800 - 1868 1869 - 1987 1988 - 1995 1996 - 2002 2003 - 2008 mama English
1800 - 1833 1834 - 1864 1865 - 1872 1873 - 1950 1951 - 2008 papa English
1800 - 1840 1841 - 2002 2003 - 2004 2005 - 2006 2007 - 2008 mom English
1800 - 1899 1900 - 2001 2002 - 2004 2005 - 2006 2007 - 2008 dad English

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