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Since I tried Ludwig back in 2017, I have been constantly using it in both editing and translation. Ever since, I suggest it to my translators at ProSciEditing.

Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com
biennium
Grammar usage guide and real-world examplesUSAGE SUMMARY
The word "biennium" is correct and usable in written English.
It refers to a period of two years, often used in formal contexts such as financial reports or academic schedules. Example: "The university's budget is planned on a biennium basis to ensure adequate funding for all programs." Alternatives include "two-year period" or "two-year term."
✓ Grammatically correct
News & Media
Encyclopedias
Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Human-verified examples from authoritative sources
Exact Expressions
33 human-written examples
(The Legislature had authorised $7.5m for the 2014-15 biennium).
News & Media
On May 20th the House and Senate agreed to spend $80.6 billion over the 2012-2013 biennium.
News & Media
As the session opened in January the state faced a $27 billion shortfall for the 2012-13 biennium, or roughly a quarter of the state's projected general-revenue spending over that period.The comptroller, Susan Combs, had estimated that Texas would collect $77.3 billion in funds available.
News & Media
Facing such grim forecasts, legislators grudgingly agreed to spend $3.97 billion from the rainy day fund to cover the shortfall in the current biennium, which actually has shrunk a bit.
News & Media
Measures concerning guns, abortion and voter identification are in the queue.Redistricting will be a big issue, as will the budget: the state's shortfall could exceed $20 billion in the 2012-2013 biennium, although the comptroller's official assessment is not due until the new year.
News & Media
For the 2012 13 biennium the UN's budget stood at $5.15 billion, down from $5.41 billion the previous biennium.
Encyclopedias
Espartero made his reappearance in politics in 1854 to share control of the government with General Leopoldo O'Donnell during the so-called bienio progresista (the progressive biennium).
Encyclopedias
For the 2012 13 biennium, the UN's budget was cut to $5.15 billion from the previous $5.41 billion.
Encyclopedias
The UN's budget for the 2014 15 biennium was approved by the General Assembly in December 2013 for $5.53 billion, which represented a reduction of about 1% from the actual spending over the previous two years.
Encyclopedias
While there are no new taxes, Republicans say the budget includes $316 million over the biennium in new tax revenues, in large part as a result of taxes that were continued after they were due to expire.
News & Media
Human-verified similar examples from authoritative sources
Similar Expressions
1 human-written examples
Last biennium, the state awarded about $208 million in grants to support full-day programs.
News & Media
Expert writing Tips
Best practice
When writing for a general audience, consider using "two-year period" instead of "biennium" for better clarity.
Common error
Avoid using "biennium" when you mean "biennial". "Biennium" refers to a period of two years, while "biennial" describes an event that happens every two years. For example, a biennial conference happens every "two years", covering each "biennium".
Source & Trust
91%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The word "biennium" functions primarily as a noun, denoting a period of two years. As Ludwig indicates, it is grammatically correct and functions to specify the duration in discussions, reports or financial plans. The examples show its usage in budgeting, legislative terms, and project lifecycles.
Frequent in
News & Media
43%
Encyclopedias
24%
Formal & Business
11%
Less common in
Science
11%
Wiki
0%
Social Media
0%
Ludwig's WRAP-UP
In summary, "biennium" is a grammatically sound and frequently used noun to describe a two-year period, as confirmed by Ludwig. Its formality makes it suitable for official documents, like financial and academic reports, over informal settings. When clarity is essential for broader audiences, alternatives such as "two-year period" can be beneficial. The examples provided by Ludwig emphasize its frequent use in news articles from sources like The New York Times and The Economist, as well as in Encyclopedia Britannica.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
two-year period
Direct replacement using simpler terms.
period of two years
A more descriptive and explicit alternative.
two-year term
Focuses on the duration of a specific term or cycle.
24-month duration
Uses a numerical measure for emphasis.
a couple of years
Informal way to refer to approximately two years.
two-year cycle
Highlights cyclical aspect of the period.
dual-year timeframe
Emphasizes the combined aspect of the two years.
the next two years
Focuses on a future two-year span.
a span of two years
General way to refer to a duration of two years.
biennial period
Adjectival form, describing something occurring every two years.
FAQs
How is the term "biennium" typically used?
The term "biennium" is typically used in formal contexts such as government budgets, academic planning, and organizational reports to denote a two-year period. For example, "the budget for the next "biennium" will be finalized soon".
What's the difference between "biennium" and "biannual"?
"Biennium" refers to a period of two years, while "biannual" means twice a year. Don't confuse it with "biennial", which means every two years.
Is "biennium" formal or informal?
"Biennium" is considered a formal term. In less formal contexts, it's better to use "two-year period" or "period of two years".
What are some synonyms for "biennium"?
Synonyms for "biennium" include "two-year period", "two-year term", and "24-month duration".
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Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Source & Trust
91%
Authority and reliability
4.5/5
Expert rating
Real-world application tested