Google Books Ngram Viewer

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

1800 - 1815 1816 - 1830 1831 - 1845 1846 - 1980 1981 - 2008 astrologer English
1800 - 1858 1859 - 1935 1936 - 1948 1949 - 1992 1993 - 2008 astrologist English

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