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M4M Controlled Vocabulary

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Alphabetical
Hierarchy
Groups

PREFERRED TERM

time frequency

NARROWER CONCEPTS

annual
biennial
bimonthly
daily
irregular time spacing
only once
quadrennial
quarterly
quinquennial
three times a year
triennial
two times a year
until the number of the participants or samples are recruited/collected
weekly

URI

http://purl.org/m4m/1004

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