Google Books Ngram Viewer

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

1800 - 1932 1933 - 1982 1983 - 1988 1989 - 1994 1995 - 2000 buses English
1800 - 1815 1816 - 1941 1942 - 1947 1948 - 1972 1973 - 2000 busses English
1800 - 1852 1853 - 1872 1873 - 1882 1883 - 1950 1951 - 2000 omnibuses English

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