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
for centuries when
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "for centuries when" is not correct and does not convey a clear meaning in written English.
It seems to be an incomplete thought and would require additional context to be usable. Example: "For centuries when people believed in myths, stories were passed down through generations."
⚠ May contain grammatical issues
News & Media
Science
Encyclopedias
Alternative expressions(3)
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
21 human-written examples
China never invaded us for centuries when this was an independent kingdom," he said.
News & Media
Ethnic Germans had lived in the Sudetenland for centuries when Hitler annexed it in 1938.
News & Media
They had been hanging vertically for centuries; when they were placed on the floor, the warp threads relaxed.
News & Media
The volcano on the tiny Caribbean island of Montserrat had been slumbering for centuries when it awoke in 1995.
News & Media
A statue's free-standing limb that would need propping up if made of clay can hold its pose for centuries when made of bronze.
News & Media
Both the hot springs and the beaches here have been used as heat sources for cooking for centuries, when fresh water and cooking fuel were scarce and expensive.
News & Media
Human-verified similar examples from authoritative sources
Similar Expressions
39 human-written examples
The ancient tribes of central Mexico had worshiped fertility gods for many centuries when the Aztec invaded the valley.
Encyclopedias
Light, portable, hard and long-lasting, such tropical spices as pepper and cloves might have been designed for the centuries when travel was slow and perilous.
News & Media
Puerto Rico was part of the Spanish Empire for four centuries, when the Puerto Ricans defended themselves against invasions from the British, French, and Dutch.
Wiki
The character of Palestrina speaks for colleagues across the centuries when he stops his work to cry, "What is the point of all this?
News & Media
Gone, for these people, are the centuries when sewage ran down open channels in the alleys into the Tigris.
News & Media
Expert writing Tips
Best practice
When describing historical contexts, ensure the conjunction clearly links the time period with the events or conditions that prevailed. Consider replacing "when" with more precise terms like "during which" or "through which" for clarity.
Common error
Avoid using "for centuries when" if the "when" clause doesn't directly follow and modify the temporal phrase. Overusing this phrase without a clear connection can create confusing or grammatically unsound sentences.
Source & Trust
87%
Authority and reliability
2.8/5
Expert rating
Real-world application tested
Linguistic Context
Temporal adverbial phrase connecting a duration with a specific event or situation. Ludwig AI indicates this phrase is often used to set a historical context, but can be grammatically tricky. The examples show varied uses, some more successful than others in creating a coherent link between the time frame and the event.
Frequent in
News & Media
68%
Science
12%
Encyclopedias
8%
Less common in
Wiki
4%
Formal & Business
4%
Reference
0%
Ludwig's WRAP-UP
The phrase "for centuries when" is used to connect a long period with a subsequent event. Ludwig AI analysis suggests that while the phrase appears frequently, it can be grammatically challenging, often requiring careful construction to ensure clarity. The phrase is most common in news and media contexts and serves primarily to provide a temporal background for historical events. When writing, consider more explicit connectors like "during which" or "throughout which" for better clarity. As highlighted by Ludwig, ensure the connection between the time frame and the event is clear and logical to avoid grammatical awkwardness.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
for centuries, whenever
Replaces "when" with "whenever" to emphasize repeated occurrences over a long duration.
for centuries, during which
Uses "during which" to provide a formal connection between a long period and subsequent events.
over the centuries, when
Switches to "over the centuries" to emphasize the duration and then uses "when" to introduce a specific event.
across the centuries, as
Employs "across the centuries" to highlight a gradual development alongside the events indicated by "as".
throughout the centuries, when
Utilizes "throughout the centuries" to indicate an ongoing condition during the events described by "when".
for hundreds of years, when
Replaces "centuries" with "hundreds of years" for a less formal tone, maintaining the "when" clause.
in the centuries when
Adds "in" to specify a period, keeping the structure and causality of the original phrase.
during the centuries that
Specifies the duration with "during the centuries that", focusing on the timeframe.
in the centuries where
Replaces "when" with "where" to subtly shift the focus to the context of the time period.
across many centuries, when
Rephrases to "across many centuries" to broaden the temporal scope before introducing the condition with "when".
FAQs
How can I use the phrase "for centuries" correctly?
The phrase "for centuries" describes a period spanning multiple centuries. To connect it to a subsequent event, use phrases like "for centuries, "people believed that"...", or "for centuries, "this practice continued"...".
What are some alternatives to "for centuries when"?
Alternatives include "for centuries, during which", "over the centuries", or "throughout the centuries", depending on the specific context you wish to convey.
Is "for centuries when" grammatically correct?
As Ludwig AI pointed out, the phrase "for centuries when" is often incomplete and requires careful construction to ensure grammatical correctness. It's crucial to establish a clear and logical connection between the duration and the event that follows.
What's the difference between "for centuries when" and "for centuries, during which"?
"For centuries, during which" explicitly connects a long duration with a subsequent event or condition, providing a clear temporal relationship. "For centuries when" requires a more immediate and direct connection, which can sometimes be grammatically awkward if not handled carefully.
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
87%
Authority and reliability
2.8/5
Expert rating
Real-world application tested