Google Books Ngram Viewer

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

1800 - 1915 1916 - 1978 1979 1980 - 1993 1994 - 1998 czechland English
1800 - 1971 1972 1973 - 1991 1992 - 1996 1997 - 1998 czechlands English

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