Google Books Ngram Viewer

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

1800 - 1961 1962 - 1993 1994 - 1995 1996 1997 - 2000 blood moon English
1800 - 1824 1825 - 1908 1909 - 1923 1924 - 1963 1964 - 2000 harvest moon English

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