Google Books Ngram Viewer

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

1800 - 1881 1882 - 1973 1974 - 1982 1983 - 1990 1991 - 2000 prophylactic English
1800 - 1951 1952 - 1994 1995 - 1996 1997 - 1998 1999 - 2000 condom English

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