Google Books Ngram Viewer

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

1800 - 1837 1838 - 1908 1909 - 1919 1920 - 1974 1975 - 2000 yours sincerely English
1800 - 1890 1891 - 1946 1947 - 1951 1952 - 1985 1986 - 2000 sincerely yours English

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