Google Books Ngram Viewer

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

1800 - 1869 1870 - 1955 1956 - 1964 1965 - 1986 1987 - 2000 write out a prescription English
1800 - 1874 1875 - 1944 1945 - 1946 1947 - 1977 1978 - 2000 make out a prescription English

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