Google Books Ngram Viewer

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

1950 - 1970 1971 - 1994 1995 - 1996 1997 - 1998 1999 - 2000 strategic planning English
1950 - 1973 1974 - 1989 1990 1991 - 1994 1995 - 2000 incremental planning English
1950 - 1970 1971 1972 - 1977 1978 - 2000 2001 - 2000 advocacy planning English
1950 - 1961 1962 - 1973 1974 - 1975 1976 - 1993 1994 - 2000 comprehensive planning English
1950 - 1983 1984 - 1996 1997 1998 1999 - 2000 equity planning English
1950 - 1971 1972 - 1993 1994 1995 - 1999 2000 collaborative planning English
1950 - 1962 1963 - 1970 1971 - 1973 1974 - 1995 1996 - 2000 master planning English
1950 - 1952 1953 - 1974 1975 - 1978 1979 - 1989 1990 - 2000 general planning English

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