Google Books Ngram Viewer

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

1900 - 1909 1910 - 1913 1914 - 1948 1949 - 1989 1990 - 2008 have apprehension English
1900 - 1907 1908 - 1913 1914 - 1952 1953 - 1992 1993 - 2008 have apprehensions English
1900 - 1905 1906 - 1917 1918 - 1924 1925 - 1989 1990 - 2008 have an apprehension English
1900 - 1904 1905 - 1908 1909 - 1949 1950 - 1990 1991 - 2008 have some apprehensions English

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