Synonym
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Number rate of regular event |
Definition in words
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Number of regular events divided by time elapsed
Alternative expression: Number of periodic phenomenon per time
Note: Regular event is an event that re-occurs after a time
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Definition by equation
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 |
Systematic terms
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Frequency of component B in system 1 |
Result type
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Rational scale |
- Value sets are positive numerical values
- Algebraic operations are allowed (a=nb; a≠nb)
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Numerical values from 0-∞ |
Unit
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1/s, 1/min, etc. |
Reference
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- Ferard G, Dybkaer R, Fuentes-Arderiu X. Compendium of Terminology and Nomenclature of Properties in Clinical Laboratory Sciences : Recommendations 2016. 1 ed: Royal Society of Chemistry; 2016. 182 p.
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Laboratory field
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Examples
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Functional
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Example 1 |
Generic abbreviated
|
NPU21692 Heart—Systole; frequency = ? × 1/min |
Full result |
NPU21692 Heart—Systole; frequency = 88 × one per minute |
Abbreviated result |
NPU21692 Heart—Systole; frequency = 88 × 1/min |
Written expression |
The frequency of Systole of Mr. Smith’s Heart is [88] × 1/min. |
Equation
|
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Reproduction and Fertility
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Example 2 |
Generic abbreviated
|
NPU03453 Sem—Spermatozoa rotation; frequency = ? × 1/s |
Full result |
NPU03453 Semen—Spermatozoa rotation; frequency = 10 × one per second |
Abbreviated result |
NPU03453 Sem—Spermatozoa rotation; frequency = 10 × 1/s |
Written expression |
The frequency of Spermatozoa rotation in Mr. Smith’s Semen is [10] × 1/s. |
Equation |
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Reference
|
NPU database, https://www.ifcc.org/ifcc-scientific-division/sd-committees/c-npu/npusearch/ and http://www.labterm.dk/default.aspx |
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Kind-of-property
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Nominal kind-of-property
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Kind-of-quantity
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Unitary kind-of-quantity
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Rational unitary kind-of-quantity
Reference
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- Dybkaer R. Concept system on ‘quantity’: formation and terminology. Accredit Qual Assur. 2013;18(3):253-60.
- Dybkaer R. ISO terminological analysis of the VIM3 concepts ‘quantity’ and ‘kind-of-quantity’. Metrologia. 2010;47(3):127-34.
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Date |
Term |
Note |
1996-01-01 |
Frequency |
Term established |