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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
at once after
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "at once after" is correct and usable in written English.
It is used to express the idea that one event happens right after the other. For example: She jumped into the car and drove away at once after.
✓ Grammatically correct
News & Media
Science
Encyclopedias
Wiki
Alternative expressions(20)
is equivalent to
rapidly thereafter
in the wishes of
for the immediate future
Very soon
somewhere later
one week before
at the early time
in the next weeks
during the previous years
it is important to remember
to avoid disruption
not yet completed
in accordance with direction from
a couple of books before
if not soon
as excellent as
in a flash
as instructed by the directive
as tall as
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
37 human-written examples
It's uncomfortable to see so many people at once, after not seeing people for so long….
News & Media
In order to shorten the manufacturing time schedule, helium leak test was conducted at once after connecting the long length jacket not just after the welding.
NEW QUEENS SUBWAY OPENED TO TIMES SQ.; Service Starts at Once After a Celebration by City and Civic Leaders.
News & Media
Archives|NEW QUEENS SUBWAY OPENED TO TIMES SQ.; Service Starts at Once After a Celebration by City and Civic Leaders.
News & Media
At once, after this joyously sunny opening, the tone darkens: A sudden chill, from a great distance, meets me.
News & Media
Meanwhile, hardline settler groups are threatening to restart building at once, after the shooting by the radical Hamas group of four Israeli settlers near Hebron on Tuesday.
News & Media
Human-verified similar examples from authoritative sources
Similar Expressions
23 human-written examples
Tracheostomy was performed in 46 (62%) patients, and 36 (49%) patients met criteria for fatigue at least once after initially meeting readiness-to-wean criteria.
Science
If 41 Kb3/a3 Qf3+ there's no better square than c2 so he played 41 Kc2 at once but after Ne3+ 42 Kd3 Nf5 there was no perpetual and Cheparinov won easily.
News & Media
These farmers collect about 60% of their annual income all at once, right after the harvest.
News & Media
And she saw the commercial possibilities of the sisters at once, especially after an ashamed, unthinking Kate handed the twins over.
News & Media
The value of the government's stock in G.M. is still unclear -- and it could not sell all of its shares at once even after its public offering.
News & Media
Expert writing Tips
Best practice
Use "at once after" to clearly indicate that an action or event happened without any delay following a previous action or event. This emphasizes the immediate sequence.
Common error
While "at once after" is generally acceptable, it can sometimes sound slightly less formal. In highly formal or academic writing, consider using alternatives like "immediately following" or "subsequent to" for a more polished tone.
Source & Trust
86%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "at once after" functions as an adverbial phrase, specifying when an action occurred in relation to another. This usage is confirmed by Ludwig, indicating grammatical correctness.
Frequent in
News & Media
54%
Science
29%
Wiki
9%
Less common in
Encyclopedias
2%
Formal & Business
0%
Academia
0%
Ludwig's WRAP-UP
In summary, the phrase "at once after" is a grammatically correct adverbial phrase used to indicate that something happens immediately following something else. As shown by Ludwig, it's commonly found in News & Media and Science contexts. While acceptable in many situations, slightly more formal alternatives such as "immediately following" may be preferable in academic writing. The phrase serves to emphasize immediacy and sequential order.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
immediately following
Replaces "at once" with "immediately", emphasizing the lack of delay.
right after
A more informal and direct way of saying "at once after".
directly after
Similar to "immediately following", but slightly less formal.
subsequent to
A more formal way to indicate that something follows another event.
shortly after
Indicates a brief interval between events.
in the immediate aftermath of
Emphasizes the period directly following an event, often implying consequences.
instantly after
Highlights the instantaneous nature of the second event's occurrence.
without delay after
Focuses on the absence of any waiting period.
on the heels of
A more idiomatic way of saying "immediately after".
post
Simple and direct way to specify 'after' something.
FAQs
How can I use "at once after" in a sentence?
You can use "at once after" to describe two events that happen in quick succession. For example, "The alarm sounded, and the firefighters responded "at once after"."
What phrases are similar in meaning to "at once after"?
Alternatives to "at once after" include "immediately following", "right after", or "directly after".
Is "at once after" appropriate for formal writing?
While grammatically correct, "at once after" might be perceived as less formal. For academic or professional contexts, consider alternatives such as "subsequent to" or "in the immediate aftermath of".
What's the difference between "at once after" and "immediately after"?
"Immediately after" is often considered slightly more formal than "at once after", though both convey a similar meaning of temporal proximity. The choice depends on the desired tone of your writing.
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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
86%
Authority and reliability
4.5/5
Expert rating
Real-world application tested