Used and loved by millions
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
duration is completed
Grammar usage guide and real-world examplesUSAGE SUMMARY
'duration is completed' is correct and usable in written English.
You can use it to describe a situation where something has been running for a certain amount of time and has now ended. For example, "The duration of the project was three months, and now it is completed."
✓ Grammatically correct
Science
News & Media
Formal & Business
Alternative expressions(20)
timeframe is over
the period has ended
the timeframe is over
the allotted time is up
the time span is finished
the interval has elapsed
the phase is finalized
period is completed
interval is completed
duration is allocated
duration is exceeded
duration is corrected
duration is accumulated
term is completed
course is completed
life is completed
duration is demonstrated
duration is composed
duration is located
duration is anticipated
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
1 human-written examples
When the target force level was reached, the subject was instructed to maintain the level of effort at this level for a period until the 5 s duration is completed.
Human-verified similar examples from authoritative sources
Similar Expressions
59 human-written examples
After the chosen heating duration was completed, heating would be stopped and the reactor would be allowed to cool naturally while maintaining a reductive (H2) atmosphere.
In 2013, a near circumpolar balloon flight of 14 days duration was completed after launch from Esrange, Sweden, resulting in a measurement of the linear polarisation of the Crab emission.
Science
The eruption lasts six or seven days, and the whole duration of the disease is completed in from nine to twelve days".
Science
The division of the three fermentation phases was consistent with the definition of the phenotypes, i.e. the end of lag-phase is when OD reaches 2% of the maximum OD, the end of growth-phase is when glucose consumption is completed, and the duration of stationary-phase is fixed at 10 hours after the end of growth phase.
Science
The EMA requires that clinical trials of at least 12 months' duration are conducted to collect safety and immunogenicity data, with a comparative phase of at least 6 months' duration to be completed before approval 19.
Each device node with an allocated GTS ensures that the data transmission time, waiting time for ACK, time to transmit ACK packet, and interframe spacing (IFS) duration can be completed before the end of its GTS period.
Internship (usually 1 year in duration) must be completed before full registration on the General Division of the Medical Register can be achieved.
Science
Patients were interviewed by the chief investigator at their next outpatient appointment after a further chemotherapy cycle (usually of 3 weeks' duration) had been completed.
Science
(ii) is a stage during the ontogenetic development of buds toward bud burst after duration (i) has been completed.
Approximately half (54%) of the 183 trials that reported the duration of enrolment were completed in less than two years.
Science
Expert writing Tips
Best practice
Use "duration is completed" to clearly state that a specific time period has ended, especially when referring to studies, projects, or treatment plans. For instance, "Once the treatment duration is completed, follow-up appointments will be scheduled."
Common error
Avoid using "duration is completed" when you actually mean "the task is finished". "Duration" refers specifically to the length of time, not the completion of an activity. Be precise in your word choice.
Source & Trust
77%
Authority and reliability
4.1/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "duration is completed" functions as a descriptor of a time period, indicating that the specified timeframe has reached its end. As stated by Ludwig AI, it describes a situation where something has been running for a certain amount of time and has now ended.
Frequent in
Science
45%
News & Media
30%
Formal & Business
25%
Less common in
Wiki
0%
Encyclopedias
0%
Reference
0%
Ludwig's WRAP-UP
The phrase "duration is completed" is used to express the end of a specific time frame related to an event or activity. Ludwig AI indicates that the phrase is correct and usable in English. Though its occurrence is rare, it appears across various domains, including science, news, and business. Remember that "duration" refers to the length of time, therefore, be sure of the correct context and word choice. Always verify that you are talking about the length of something (and not the activity itself).
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
the period has ended
Replaces "duration" with "period" and uses a more direct verb "ended" instead of the passive "is completed".
the timeframe is over
Uses "timeframe" to denote a specific period, and "is over" to indicate completion.
the allotted time is up
Specifies that the time was pre-determined and has now expired.
the time span is finished
Uses "time span" as a synonym for duration, and "finished" for completed.
the interval has elapsed
Replaces duration with "interval" and uses the formal verb "elapsed".
the phase is finalized
Replaces "duration" with "phase", and uses "finalized" to mean completed.
the stage is done
Substitutes "duration" with "stage", implying a part of a larger process, and uses "done" for completed.
the term is fulfilled
Uses "term" to specify a particular duration, and "fulfilled" to indicate completion.
the cycle is concluded
Implies duration within the context of a cycle, with "concluded" as a more formal version of completed.
the process is terminated
Highlights the end of a process related to the duration, using the word "terminated" that has a more abrupt feeling.
FAQs
How can I use "duration is completed" in a sentence?
You can use "duration is completed" to indicate that a specific time period for an activity or process has come to an end. For instance, "After the 12-week program duration is completed, participants will receive a certificate."
What's a similar phrase to "duration is completed"?
A similar phrase is "the period has ended". It also conveys the idea that a specific time frame has finished.
Is "duration is completed" the same as "duration has ended"?
While similar, "duration is completed" focuses on the fulfillment of the intended time frame, whereas "duration has ended" simply indicates that the time has passed. The subtle difference lies in whether the planned time was fully utilized.
When should I use "timeframe is over" instead of "duration is completed"?
Use "timeframe is over" when you want to emphasize the overall time limit, not necessarily the specific length of an activity. "Duration is completed" is more precise about the length of something.
Editing plus AI, all in one place.
Stop switching between tools. Your AI writing partner for everything—polishing proposals, crafting emails, finding the right tone.
Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Source & Trust
77%
Authority and reliability
4.1/5
Expert rating
Real-world application tested