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infrequency

C2 / Very Low
UK/ˌɪnˈfriː.kwən.si/US/ˌɪnˈfriː.kwən.si/

Formal to Academic

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Definition

Meaning

The state or condition of happening or appearing very rarely or not often.

An unusually long interval between occurrences; a quality of being uncommon, scarce, or seldom observed in a pattern or sequence.

Linguistics

Semantic Notes

An abstract noun describing a quality of events or phenomena. It is the nominal form of the adjective 'infrequent'.

Dialectal Variation

British vs American Usage

Differences

No significant differences in meaning, spelling, or usage. Both varieties use the word identically.

Connotations

Formal, somewhat clinical, and statistical in both dialects.

Frequency

Equally rare in both UK and US English, found primarily in formal writing.

Vocabulary

Collocations

strong
the sheer infrequency ofdue to the infrequencynotable for its infrequency
medium
relative infrequencyextreme infrequencyremarkable infrequency
weak
infrequency of visitsinfrequency of eventsinfrequency of occurrence

Grammar

Valency Patterns

the infrequency of [NOUN PHRASE]because of its infrequencydespite the infrequency with which

Vocabulary

Synonyms

Strong

sparsenesssporadic nature

Neutral

rarityuncommonness

Weak

irregularityscarcity

Vocabulary

Antonyms

frequencycommonnessregularityprevalence

Phrases

Idioms & Phrases

  • “few and far between (related concept)”
  • “once in a blue moon (related concept)”

Usage

Context Usage

Business

Used in reports to discuss irregular customer complaints or rare market fluctuations.

Academic

Common in statistical, scientific, or sociological papers discussing low-rate phenomena.

Everyday

Rarely used in casual conversation; simpler words like 'rarity' are preferred.

Technical

Used in fields like epidemiology, astronomy, or quality control to describe low-probability events.

Examples

By Part of Speech

adverb

British English

  • She attended so infrequently that her infrequency was noted.

American English

  • The buses run infrequently, an infrequency that frustrates commuters.

adjective

British English

  • His visits are infrequent, hence the infrequency of his contact.

American English

  • Their infrequent meetings led to an overall infrequency of communication.

Examples

By CEFR Level

B1
  • The infrequency of buses makes it hard to travel.
B2
  • The main issue is the infrequency of direct flights to that region.
C1
  • The study highlighted the remarkable infrequency of such genetic mutations in the general population.

Learning

Memory Aids

Mnemonic

Think 'IN + FREQUENCY' = 'NOT frequent', meaning the state of not happening often.

Conceptual Metaphor

TIME AS DISTANCE (e.g., 'long gaps between events', 'far apart in time').

Watch out

Common Pitfalls

Translation Traps (for Russian speakers)

  • Do not confuse with 'нечастотность' (a technical term for low frequency in signal processing). The closest conceptual translation is 'редкость'.

Common Mistakes

  • Misspelling as 'infrequencey' or 'infrequenzy'.
  • Using it as a countable noun (e.g., 'an infrequency'). It is typically uncountable.

Practice

Quiz

Fill in the gap
The of major earthquakes in this region gave residents a false sense of security.
Multiple Choice

In which context is 'infrequency' LEAST likely to be used?

FAQ

Frequently Asked Questions

No, it is a formal, low-frequency word, typical of academic or technical writing.

'Infrequency' specifically refers to the rate of occurrence over time. 'Rarity' can refer to time but also to the general scarcity of items or events.

Not directly. It describes the pattern of their actions or appearances (e.g., 'the infrequency of his visits'), not the person themselves.

No. The related adjective is 'infrequent'. There is no direct verb; you would use phrases like 'occur infrequently'.