Google Books Ngram Viewer

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

Ngrams not found: management 's approval, [management 's approval]
The Ngram Viewer is case sensitive. Check your capitalization!

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1800 - 1956 1957 - 1989 1990 - 1993 1994 - 1997 1998 - 2000 management approval English

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