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
upon their availability
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "upon their availability" is correct and usable in written English.
It can be used when referring to actions or decisions that depend on the availability of certain resources or individuals. Example: "We will schedule the meeting upon their availability to ensure everyone can attend."
✓ Grammatically correct
Science
News & Media
Wiki
Alternative expressions(15)
depending on their availability
subject to their availability
when they are available
based on their availability
contingent on their availability
if they are available
as soon as they are free
as soon as we have them
immediately upon receipt
once they are accessible
as soon as they become available
when they become available
when access is granted
when they became available
when they were available
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
3 human-written examples
Interested participants were recruited based upon their availability to attend one of the focus groups.
Science
Although selected based upon their availability in the Netherlands, their wide availability makes the data presented in this study generally relevant to most countries.
The November 2002 and April 2003 assemblies of human and the February 2002 and February 2003 assemblies of mouse genome were used for this purpose depending upon their availability at the time of our analyses (Additional files 10 and 11 list relevant FASTA sequences and genomic coordinates).
Science
Human-verified similar examples from authoritative sources
Similar Expressions
56 human-written examples
Participants were recruited based upon their interest and availability to attend one of the focus group sessions.
Science
For liquid chromatography/mass spectrometry (LC/MS) analysis, the 0.1 mL aliquot of sample (upon availability) was lyophilized and then redissolved in 100 μL of 90% acetonitrile in water.
Science
The implementation of lines of OR in the development and evaluation of anti-cancer drugs hinges upon the availability of specific knowledge, methods, instruments and resources and upon their appropriate integration in the mainstream of clinical research.
The way beds are managed has consequences on all organization levels: emergency and accident departments, surgery theatres, as in both cases their activity depends upon bed availability.
Science
Nocturnal behaviour has been observed in wild pigs [ 55] who seem to be able to adjust their activity patterns based upon food availability [ 56].
Science
These results suggest that some individuals had been debilitated by reproductive activity, which led to their death upon low food availability due to low salinity and related environmental changes caused by flooding.
In fact, their initial development has been almost entirely dependent upon the availability in public databases of human, murine, bovine, and canine sequences for allowing primer design.
Science
Commercially available systems [ 14] depend upon the availability of the particular vector from the supplier.
Science
Expert writing Tips
Best practice
When using "upon their availability", ensure the context clearly indicates what action or decision is dependent on their availability. This clarifies the relationship and avoids ambiguity.
Common error
Avoid using "upon their availability" in very informal contexts. While grammatically correct, it can sound overly formal or stilted in casual conversation. Instead, opt for simpler alternatives like "when they're free".
Source & Trust
81%
Authority and reliability
4.1/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "upon their availability" functions as a prepositional phrase modifying a verb or clause, indicating that an action or event is contingent on the accessibility or readiness of specific individuals. Ludwig shows examples in contexts requiring formal or precise expression.
Frequent in
Science
60%
News & Media
20%
Wiki
20%
Less common in
Formal & Business
0%
Encyclopedias
0%
Reference
0%
Ludwig's WRAP-UP
In summary, the phrase "upon their availability" is a grammatically correct prepositional phrase used to indicate that an action or event depends on the accessibility of certain individuals. According to Ludwig, it's most commonly found in scientific contexts. While grammatically sound, it's best suited for formal or professional settings and should be used judiciously in informal communication. Alternatives like "depending on their availability" or "when they are available" can offer a more casual tone. Despite its correctness, the phrase has relatively low frequency overall.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
depending on their availability
Replaces "upon" with "depending on", slightly altering the tone while retaining the core meaning.
based on their availability
Directly states that something is determined by their availability.
given their availability
Acknowledges their availability as a factor.
subject to their availability
Emphasizes the conditionality based on their availability.
contingent on their availability
Highlights the dependency of an action on their availability.
as their availability permits
Indicates allowance based on the constraints of their availability.
when they are available
Simplifies the phrasing to a more direct statement of availability.
depending when they are free
Using the word "free" instead of "availability" to convey the same meaning
if they are available
Expresses a condition that depends on their availability
when their schedule allows
Replaces "availability" with "schedule", focusing on calendar constraints.
FAQs
How can I use "upon their availability" in a sentence?
You can use "upon their availability" to indicate that something will happen only when someone is free or has the capacity to do something. For example, "The meeting will be scheduled upon their availability".
What phrases are similar to "upon their availability"?
Alternatives include "depending on their availability", "subject to their availability", or "when they are available".
Is it correct to say "depending of their availability" instead of "upon their availability"?
No, the correct phrasing is "depending on their availability". "Upon their availability" is also correct, but slightly more formal.
What is the difference between "upon their availability" and "given their availability"?
"Upon their availability" suggests a future action contingent on someone's availability, while "given their availability" acknowledges their availability as a present condition. They are very similar and mostly interchangeable, with "given their availability" being more suitable when talking about present or past situations.
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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
81%
Authority and reliability
4.1/5
Expert rating
Real-world application tested