Google Books Ngram Viewer

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

1900 - 1944 1945 - 1995 1996 - 1999 2000 - 2004 2005 - 2008 motor neuron English
1900 - 1932 1933 - 1995 1996 - 1999 2000 - 2003 2004 - 2008 motor neurons English
1900 - 1914 1915 - 1970 1971 - 1977 1978 - 1995 1996 - 2008 motor neurone English
1900 - 1909 1910 - 1921 1922 - 1927 1928 - 1988 1989 - 2008 motor neurones English

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