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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
span over which
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "span over which" is correct and usable in written English.
It can be used to describe a range or extent of time, space, or other measurable quantities. Example: "The project will take place over a span over which we will gather data and analyze results."
✓ Grammatically correct
Science
News & Media
Alternative expressions(4)
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
28 human-written examples
What is the span over which "lost sleep" can be recovered?
News & Media
A vast temperature span over which water molecules can pool and cling as the liquid assets we love best.
News & Media
There are several factors: The six-week time span over which Line of Duty aired was crucial.
News & Media
Stopping the burning of all fossil fuels today would not remove the cumulative carbon burden that has already raised CO2 abundance in the atmosphere to a level not seen on earth in the past five hundred thousand years, a span over which we have direct data.
News & Media
Yonhap's report doesn't mention which phones in particular were affected by the price-fixing scheme, nor does it mention the time span over which these practices occurred.
News & Media
The magnetic nulls indicated by the Poincaré index as shown in Figure 1a are observed nearly within the time span over which the plasma flow reverses (Figure 1b).
Science
Human-verified similar examples from authoritative sources
Similar Expressions
31 human-written examples
Or he might, arbitrarily, select the most favourable time-span over which to measure performance.In this section Who now?
News & Media
Additionally, the different time spans over which the two ZTD estimates were carried out (5 min for IGS solutions and 2 h for GAMIT solutions) should be taken into account.
Science
We code the first-order van der Pol equations into a MATLAB functiona as follows: To solve Eq. (3), we specify the coefficient μ, the initial conditions and the time-span over which the integration is to proceed; then pass these values, along with the name of the van der Pol function, to the Runge-Kutta solver ode45: The calculated results are plotted in Figure 1.
Science
The time spans over which changes were measured were an average of 2.3 years (SD of 0.4) in the study by Boyd et al. and 1 year in the study by Woolcott et al. The intervention groups in both studies showed weight losses over the study period of −0.3 kg (no measure of statistical dispersion reported) and −2.3 kg (95 % CI −2.9; −1.7), respectively.
Science
Kirsch et al. circumvented this difficulty through careful measurement of the electron activity in their FeS suspensions, which also spanned that over which we expect Hg II) to be reduced.
Expert writing Tips
Best practice
When using "span over which", ensure clarity by specifying the units of measurement (e.g., time, distance, temperature) to avoid ambiguity.
Common error
Avoid using "span over which" when simply referring to a point in time or a single instance. The phrase implies a duration or range, not a specific moment.
Source & Trust
83%
Authority and reliability
4.1/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "span over which" functions as a prepositional phrase, often used to modify nouns or clauses by specifying the duration, range, or scope within which an action, event, or condition occurs. This usage is supported by Ludwig's examples, demonstrating its role in providing temporal or spatial context.
Frequent in
Science
60%
News & Media
30%
Wiki
10%
Less common in
Formal & Business
0%
Encyclopedias
0%
Reference
0%
Ludwig's WRAP-UP
In summary, "span over which" is a prepositional phrase used to define a period or range during which something occurs. According to Ludwig, it's considered grammatically correct and is commonly found in scientific and news contexts, suggesting a neutral to formal register. When using the phrase, ensure clarity and precision by specifying the units of measurement. Alternatives such as "period during which" or "range throughout which" can be used depending on the desired emphasis. Avoid using it to refer to a single point in time rather than a duration.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
timeframe throughout which
Specifically refers to a period of time and its extent.
period during which
Focuses on the temporal aspect, emphasizing the duration.
duration across which
Highlights the length of something and its coverage.
range throughout which
Highlights the extent or scope involved.
interval across which
Suggests a specific segment or portion of something.
spectrum throughout which
Implies a range of values or characteristics.
extent to which
Emphasizes the degree or magnitude of something.
degree to which
Focuses on the intensity or level of something.
scope within which
Focuses on the boundaries or limitations.
field in which
Suggests an area of study, activity, or interest.
FAQs
How can I use "span over which" in a sentence?
Use "span over which" to describe a period or range during which something occurs or exists. For example, "The research project will take place over a "span over which" data will be collected and analyzed".
What's a good alternative to "span over which"?
Alternatives include phrases like "period during which", "range throughout which", or "interval across which", depending on the specific context.
Is it more appropriate to use "span over which" or "during which"?
"Span over which" emphasizes the duration or extent, while "during which" simply indicates that something happens within a certain timeframe. Use "span over which" when the length or range is significant to the meaning.
What is the difference between "span over which" and "extent to which"?
"Span over which" refers to a period or range, while "extent to which" refers to the degree or magnitude of something. They are not interchangeable.
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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
83%
Authority and reliability
4.1/5
Expert rating
Real-world application tested