Google Books Ngram Viewer

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

1800 - 1945 1946 - 1987 1988 - 1991 1992 - 1995 1996 - 2000 the conspiracy theory English
1800 - 1968 1969 - 1992 1993 - 1995 1996 - 1997 1998 - 2000 a conspiracy theory English

Run your own experiment! Raw data is available for download here.
© 2013 Google - Privacy & Terms - About Google - About Google Books - About Ngram Viewer