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<iframe name="ngram_chart" src="https://books.google.com/ngrams/interactive_chart?content=co%C3%B6perate%2Cco-operate%2Ccooperate&case_insensitive=on&year_start=1700&year_end=2008&corpus=15&smoothing=3&direct_url=t1%3B%2Cco%C3%B6perate%3B%2Cc0%3B.t1%3B%2Cco+-+operate%3B%2Cc0%3B.t4%3B%2Ccooperate%3B%2Cc0%3B%2Cs0%3B%3Bcooperate%3B%2Cc0%3B%3BCooperate%3B%2Cc0" width=900 height=500 marginwidth=0 marginheight=0 hspace=0 vspace=0 frameborder=0 scrolling=no></iframe>

Part-of-speech tags
cook_VERB, _DET_ President

Wildcards
King of *, best *_NOUN

Inflections
shook_INF drive_VERB_INF

Arithmetic compositions
(color /(color + colour))

Corpus selection
I want:eng_2019

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American English2012

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American English2009

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Chinese (simplified)2009

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English2009

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English One Million2009

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