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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
on its third week
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "on its third week" is correct and usable in written English.
It can be used to indicate that something has been ongoing for three weeks, often in contexts related to projects, events, or processes. Example: "The project is on its third week, and we are making significant progress."
✓ Grammatically correct
Wiki
News & Media
Alternative expressions(2)
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
11 human-written examples
In Australia the song debuted on the ARIA Charts at number twenty-eight, and reached number one on its third week on the chart.
Wiki
On its third week, it fell to No. 2, being replaced at the top by Vicente Fernández' Primera Fila.
Wiki
It rose to number five on its third week, and later peaked at number four, staying there for five weeks.
Wiki
The subsequent week, it rose to number 58, and on its third week, the single rose to number 52.
Wiki
The following week it jumped to No. 4, and on its third week, the album reached No. 1 position on the country.
Wiki
When Adele's 25 was released last month, hopes were high that it would revitalise the music industry – but in fact it exceeded the wildest expectations of most commentators, immediately becoming the fastest-selling album of all time, and shifting well over 5.2m copies in three weeks in the US alone (it just effortlessly sold three times Coldplay's new album on its third week on the charts).
News & Media
Human-verified similar examples from authoritative sources
Similar Expressions
49 human-written examples
On its fifth week, it fell to No. 2, being replaced at the top by Luis Fonsi's Palabras del Silencio.
Wiki
On its eleventh week, it entered the top ten at number nine, thus giving Swift her fourth consecutive top ten hit from her debut album.
Wiki
On its second week, it rose to the eighty-third position which is where it peaked, and the next week it dropped to number eighty-seven, wasch was its final appearance on the chart.
Wiki
I quickly thought to myself that KAUST could actually brag that on its first week it gave a great lesson in accountability and research before making statements, particularly if you are an authoritative figure.
News & Media
On its fifth week it reached its highest sales week with 229,000 copies sold....Baby One More Time spent a total of six non-consecutive weeks at number one, and sold more than 1.8 million copies in its first two months of release in the country.
Wiki
Expert writing Tips
Best practice
When describing trends or progress, use "on its third week" to clearly indicate a specific point in time within a series of events, such as a product launch or a project timeline.
Common error
Avoid confusing the specific point in time with the entire three-week period. "On its third week" refers to a single week, not the cumulative progress over three weeks.
Source & Trust
85%
Authority and reliability
4.3/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "on its third week" functions as an adverbial phrase, modifying a verb or clause to indicate the timing of an action or event within a series of weeks. As demonstrated by Ludwig, the phrase specifies when something happens in relation to a period of three weeks.
Frequent in
Wiki
33%
News & Media
30%
Science
10%
Less common in
Formal & Business
10%
Reference
7%
Encyclopedias
0%
Ludwig's WRAP-UP
In summary, the phrase "on its third week" is a grammatically sound and frequently used adverbial phrase, particularly in Wiki and News & Media contexts, to specify timing within a sequence of weeks. Ludwig AI validates its correctness and provides numerous examples across diverse sources. Alternative phrases like "during its third week" or "in its third week" offer similar meanings. When using the phrase, ensure clarity by distinguishing the specific week from the entire three-week duration. The register is generally neutral, making it suitable for various writing styles.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
during its third week
Replaces the preposition "on" with "during", maintaining the same meaning.
in its third week
Substitutes "on" with "in", offering a slightly more general timeframe.
within the third week
Emphasizes that something occurred at some point during the third week.
in the 3rd week
Uses a numerical abbreviation for "third", making it less formal.
by the third week
Indicates completion or a state achieved by the end of the third week.
the third week of its run
Adds specificity by explicitly mentioning a "run", implying a series of events.
at the end of the third week
Highlights the culmination of the third week, rather than its duration.
after two weeks
Focuses on the duration leading up to the event, rather than the specific week.
three weeks into it
Uses a more casual phrasing to indicate the same timeframe.
the week of its third occurrence
Rephrases to emphasize the third instance or repetition of something.
FAQs
How to use "on its third week" in a sentence?
You can use "on its third week" to specify when an event occurs within a series of weeks. For example, "The song reached number one "on its third week" on the charts."
What can I say instead of "on its third week"?
You can use alternatives like "during its third week", "in its third week", or "by the third week" depending on the specific nuance you want to convey.
Which is correct, "on its third week" or "in its third week"?
Both "on its third week" and "in its third week" are grammatically correct and often interchangeable. The choice depends on the context and desired emphasis.
What's the difference between "on its third week" and "after three weeks"?
"On its third week" specifies an event occurring during that particular week. "After three weeks" indicates a point in time following the completion of three weeks. They describe different timeframes.
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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
85%
Authority and reliability
4.3/5
Expert rating
Real-world application tested