Google Books Ngram Viewer

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

Ngrams not found: banned=>DDT, ban=>DDT, resistance=>DDT, resistant=>DDT, sprays=>DDT, spray=>DDT, sprayed=>DDT, spraying=>DDT

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1950 - 1952 1953 - 1971 1972 - 1974 1975 - 1996 1997 - 2008 ddt English

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