Google Books Ngram Viewer

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

1800 - 1828 1829 - 1888 1889 - 1900 1901 - 1981 1982 - 2008 might should English
1800 - 1834 1835 - 1954 1955 - 1969 1970 - 1998 1999 - 2008 might could English
1800 - 1840 1841 - 1932 1933 - 1948 1949 - 1986 1987 - 2008 might would English

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