Google Books Ngram Viewer

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

1850 - 1855 1856 - 1862 1863 - 1869 1870 - 1955 1956 - 2000 morning twilight English
1850 - 1855 1856 - 1862 1863 - 1887 1888 - 1961 1962 - 2000 evening twilight English

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