Google Books Ngram Viewer

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

1920 - 1937 1938 - 1974 1975 - 1979 1980 - 1994 1995 - 2008 showed an upward trend English
1920 - 1933 1934 - 1966 1967 - 1971 1972 - 1995 1996 - 2008 show an upward trend English
1920 - 1930 1931 - 1967 1968 - 1973 1974 - 1992 1993 - 2008 of an upward trend English
1920 - 1936 1937 - 1972 1973 - 1977 1978 - 1990 1991 - 2008 shown an upward trend English
1920 - 1937 1938 - 1985 1986 - 1990 1991 - 2002 2003 - 2008 on an upward trend English
1920 - 1932 1933 - 1965 1966 - 1971 1972 - 1996 1997 - 2008 shows an upward trend English
1920 - 1932 1933 - 1976 1977 - 1983 1984 - 1999 2000 - 2008 is an upward trend English
1920 - 1933 1934 - 1960 1961 - 1966 1967 - 1996 1997 - 2008 been an upward trend English
1920 - 1931 1932 - 1946 1947 - 1952 1953 - 1997 1998 - 2008 was an upward trend English
1920 - 1937 1938 - 1976 1977 - 1981 1982 - 1997 1998 - 2008 showing an upward trend English
1920 - 1947 1948 - 1988 1989 - 1991 1992 - 2003 2004 - 2008 been on an upward trend English
1920 - 1933 1934 - 1985 1986 - 1991 1992 - 2005 2006 - 2008 is on an upward trend English
1920 - 1945 1946 - 1990 1991 - 1993 1994 - 2005 2006 - 2008 was on an upward trend English
1920 - 1930 1931 - 1941 1942 1943 - 1994 1995 - 2008 were on an upward trend English
1920 - 1942 1943 - 1988 1989 - 1993 1994 - 2000 2001 - 2008 are on an upward trend English
1920 - 1953 1954 - 1986 1987 - 1990 1991 - 1999 2000 - 2008 continued on an upward trend English
1920 - 1940 1941 - 1970 1971 - 1974 1975 - 1998 1999 - 2008 be on an upward trend English
1920 - 1942 1943 - 1971 1972 1973 - 1983 1984 - 1992 and on an upward trend English
1920 - 1964 1965 - 1984 1985 - 1986 1987 - 2004 2005 - 2008 continue on an upward trend English
1920 - 1958 1959 - 1987 1988 - 1989 1990 - 2005 2006 - 2008 still on an upward trend English
1920 - 1932 1933 - 1960 1961 - 1966 1967 - 1997 1998 - 2008 there is an upward trend English

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