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
time in use
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "time in use" is correct and usable in written English.
It can be used to refer to the duration that something has been actively utilized or employed. Example: "The device has a total time in use of over 500 hours, indicating its reliability and performance."
✓ Grammatically correct
Science
News & Media
Formal & Business
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
25 human-written examples
You are also charged a prorated fee on your contract for the time in use, a $35 restocking fee and any extra charges.
News & Media
From the perspective of the circular economy, environmental considerations should, for example, increasingly entail product's use phase not only to increase product's energy-efficiency, but also to prolong the time in use.
Motor vehicles can spend more time in use, with less human error, but there will be no human operator to share in the gains.At the same time labour markets are hollowing out, polarising into high- and low-skill occupations, with very little employment in the middle.
News & Media
Clinical medication keeps an enormously broad range of drug molecules at this time in use, and new drugs are added to the list every year.
Science
Both problem-focused and emotion-focused coping styles improved over time in use and effectiveness in the intervention group, whereas little or no change occurred in these coping behaviors in the control group.
Academia
Based on tests at Shoeburyness in October 1861 when the Warrior was launched, it "was practically invulnerable to the ordnance at the time in use".
Wiki
Human-verified similar examples from authoritative sources
Similar Expressions
35 human-written examples
Howard said these could help ease the burden on the Grid and cut energy bills because suppliers could offer "time-in-use" tariffs that charge customers based partly on when they use their energy.
News & Media
He lost no time in using his special powers.
News & Media
Actually, the Yankees are wasting no time in using Mr. Rodriguez as a marketing tool.
News & Media
Caregivers reported that participants spent more time in using the computers, but still needed occasional guidance.
Washington has wasted precious time in using diplomatic, economic and military levers to influence the course of events in Syria.
News & Media
Expert writing Tips
Best practice
When discussing product lifespan or reliability, use "time in use" to clearly specify the duration of active operation, as opposed to shelf life or storage time.
Common error
Avoid using "time in use" when you actually mean "time-of-use" billing, which refers to energy tariffs that vary based on when energy is consumed.
Source & Trust
85%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "time in use" primarily functions as a noun phrase specifying the duration of activity or operation. It's often used to quantify how long something has been actively functioning. Ludwig AI confirms its common usage across various contexts.
Frequent in
Science
50%
News & Media
30%
Formal & Business
20%
Less common in
Wiki
0%
Encyclopedias
0%
Reference
0%
Ludwig's WRAP-UP
In summary, "time in use" is a common and grammatically correct noun phrase used to specify the duration something has been actively operating. As Ludwig AI confirms, it appears frequently in scientific, news, and formal business contexts. When writing, ensure to differentiate it from "time-of-use" billing. Consider alternatives like "duration of use" or "operational time" to add variety to your language. Remember, using "time in use" accurately helps provide clarity when discussing performance, lifespan, or efficiency.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
duration of use
Replaces "time" with "duration", emphasizing the length of usage.
usage time
Inverts the word order to create a more concise version.
period of utilization
Substitutes both "time" and "use" with more formal synonyms, conveying a sense of formal or technical application.
in-service time
Highlights the duration something is actively providing a service or function.
operational time
Replaces "use" with "operational", specifically relevant for machinery or systems in operation.
length of operation
Emphasizes the measurement of how long something has been operating.
service life
Implies the total time a product or component is expected to function adequately.
runtime
Refers to the amount of time a program or process is running.
active period
Focuses on the active or functioning duration, applicable to processes or equipment.
working hours
Focuses specifically on the time something is used during work or business activities.
FAQs
How can I use "time in use" in a sentence?
You can use "time in use" to refer to the duration that something has been actively utilized, such as "The device has a total "time in use" of over 500 hours."
What is a good alternative to "time in use"?
Depending on the context, you might use alternatives like "duration of use", "period of utilization", or "usage time".
Is "time in use" grammatically correct?
Yes, "time in use" is grammatically correct and commonly used in both formal and informal contexts to describe the duration of something's active operation.
What's the difference between "time in use" and "time of use"?
"Time in use" refers to the duration that something has been used, while "time of use" typically refers to a specific schedule or period when something is used, often in the context of energy consumption or billing.
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
85%
Authority and reliability
4.5/5
Expert rating
Real-world application tested