Google Books Ngram Viewer

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

1900 - 1927 1928 1929 - 1956 1957 - 1991 1992 - 2008 leader du parti travailliste French
1900 - 1927 1928 1929 - 1945 1946 - 1980 1981 - 1992 chef du parti travailliste French
1900 - 1912 1913 - 1924 1925 - 1929 1930 - 1990 1991 - 2008 leader du parti conservateur French
1900 - 1910 1911 - 1928 1929 - 1930 1931 - 1983 1984 - 2008 chef du parti conservateur French

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