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<iframe name="ngram_chart" src="https://books.google.com/ngrams/interactive_chart?content=(Leadership%20Development%20PH-620.450)&year_start=1800&year_end=2010&corpus=0&smoothing=3" 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
Wildcards
King of *, best *_NOUN
Inflections
shook_INF drive_VERB_INF
Arithmetic compositions
(color /(color + colour))
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No valid ngrams to plot!
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Ngrams not found: 620 . 450, Leadership Development PH, (Leadership Development PH - 620 . 450)
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The characters +, -, *, / require parentheses to be interpreted as a
composition
.