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<iframe name="ngram_chart" src="https://books.google.com/ngrams/interactive_chart?content=black+hole,+worm+hole,+wormhole&year_start=1500&year_end=2008&corpus=15&smoothing=3&share=&direct_url=t1;,black%20hole;,c0;.t1;,worm%20hole;,c0;.t1;,wormhole;,c0" width=900 height=500 marginwidth=0 marginheight=0 hspace=0 vspace=0 frameborder=0 scrolling=no></iframe>
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Part-of-speech tags
cook_VERB, _DET_ President _PROPN_
Wildcards
King of *, best *_NOUN
Inflections
shook_INF drive_VERB_INF
Arithmetic compositions
(color /(color + colour))
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1500
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2008
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English (2012)
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English
2012
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black hole
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1500 - 1613
1614
1615 - 1956
1957 - 1990
1991 - 2002
English
worm hole
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1500 - 1879
1880 - 1940
1941 - 1949
1950 - 2002
2003 - 2008
English
wormhole
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1500 - 1523
1524
1525 - 1994
1995 - 2001
2002 - 2005
English