Google Books Ngram Viewer

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

1950 - 1978 1979 - 1998 1999 - 2000 2001 - 2006 2007 - 2008 tractor beam English
1950 - 1956 1957 - 1996 1997 - 2000 2001 - 2004 2005 - 2008 ray gun English

Run your own experiment! Raw data is available for download here.
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