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
frog and mouse
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "frog and mouse" is not a standard or commonly used expression in written English.
It may be used in a specific context, such as a story or a metaphor, but without additional context, its meaning is unclear. Example: "In the tale, the frog and mouse became unlikely friends, teaching each other valuable lessons about trust and courage."
⚠ May contain grammatical issues
News & Media
Science
Wiki
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
9 human-written examples
The book is about a frog and mouse and their adventure through a fantastic world full of beautiful and grotesque creatures where they make friends and have a nice night bicycling around.
News & Media
In each of the worm, frog, and mouse knockdown/knockout models, the phenotype is more severe than that of the Myo-CELFΔ mice, which appear overtly healthy.
Science
In frog and mouse oocytes TBP2 is abundant with little if any TBP present [ 50, 86].
Science
Developmentally regulated switching of AS of MEF2 genes has been described during frog and mouse development [24 26].
Published T2R and V1R/ORA sequences from lamprey (Petromyzon marinus), five teleost fish species, frog, and mouse were used as reference.
Science
These proteins have a key role in coordinating multiple extracellular signaling pathways during embryonic development of chicken, frog and mouse [ 85].
Science
Human-verified similar examples from authoritative sources
Similar Expressions
50 human-written examples
Sequence comparison of human, frog, chicken, and mouse Isl1 revealed several highly conserved regions (Fig. S2A).
Science
We find, the clinical findings in this patient are in excellent coincidence with findings in frog (Xenopus) and mouse embryos lacking neurog1.
Similar patterns are also found in frog, chicken and mouse (Additional files 4, 5, 6, 7), demonstrating that the HOX gene clusters are highly conserved and compact across vertebrate lineages.
Science
Therefore, studies on the early development of the forebrain in zebrafish, frog, chick and mouse embryos have shed light on the conserved developmental programmes that contribute to the formation and development of the vertebrate brain (Wilson and Houart, 2004).
Science
The evolutionary sequence of immunity is shown alongside the model organisms: The sponge, the nematode C. elegans, hydra, sea urchin, lancelet, also known as amphioxus, zebra fish, frog, chicken and mouse.
Science
Expert writing Tips
Best practice
When using the phrase "frog and mouse", ensure the context is clear and specific. It often appears in fantasy or allegorical contexts where unusual pairings are common. Consider alternatives if aiming for literal or scientific accuracy.
Common error
Avoid assuming readers understand the intended meaning of "frog and mouse" without providing context. The phrase lacks a widely recognized idiomatic meaning, potentially causing confusion.
Source & Trust
79%
Authority and reliability
3.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "frog and mouse" primarily functions as a noun phrase formed by the conjunction of two nouns. As Ludwig AI indicates, its meaning is context-dependent, often used in storytelling or allegorical contexts to represent an unlikely pairing.
Frequent in
Science
33%
News & Media
33%
Wiki
33%
Less common in
Formal & Business
0%
Encyclopedias
0%
Reference
0%
Ludwig's WRAP-UP
The phrase "frog and mouse" is a noun phrase that describes two distinct animals, often found together in storytelling or allegorical contexts. Ludwig AI indicates that the phrase is not a standard English expression, and its meaning depends heavily on the surrounding context. While grammatically simple, its usage is infrequent and can lead to confusion if not properly contextualized. When alternatives are needed, "unlikely duo" or "mismatched pair" can provide clearer and more idiomatic alternatives. The contexts in which this phrase can be observed tend to be very specific, as demonstrated by Ludwig.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
cat and mouse game
This alternative evokes a sense of pursuit and manipulation, differing from a simple pairing.
uneasy alliance
This highlights a strained relationship between two entities, unlike a neutral combination.
unlikely duo
Emphasizes the improbable nature of a partnership, moving beyond a mere listing of creatures.
mismatched pair
This suggests incompatibility, adding a layer of conflict not present in the original phrase.
David and Goliath
This implies a significant power imbalance and conflict, a metaphorical divergence.
odd couple
Highlights the contrasting personalities or characteristics within a relationship.
lion and lamb
This conveys a sense of peace and reconciliation, contrasting with potential conflict or neutrality.
birds of a feather
This suggests similarity and companionship, moving away from the difference implied by a frog and a mouse.
strange bedfellows
Implies an unusual partnership driven by necessity or circumstance, adding complexity.
natural enemies
This suggests inherent conflict and opposition, adding a dimension absent from the basic pairing.
FAQs
How can I use "frog and mouse" in a sentence?
The phrase "frog and mouse" can be used to describe an unlikely pairing or an allegorical relationship, such as "The story featured a "frog and mouse" who went on a quest together".
What can I say instead of "frog and mouse"?
Depending on the context, you could use alternatives like "unlikely duo" or "mismatched pair" to describe an unusual pairing. If referring to a predator-prey relationship, consider "cat and mouse game".
Is it correct to say "frog and mouse" in a scientific context?
While not grammatically incorrect, "frog and mouse" is generally not used in formal scientific writing unless referring to specific experimental models or a narrative context. More precise scientific terms are usually preferred.
What is the difference between "frog and mouse" and "cat and mouse"?
"Frog and mouse" lacks a strong idiomatic meaning and primarily denotes two distinct animals. "Cat and mouse", however, refers to a game of pursuit and manipulation, often involving unequal power dynamics.
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
79%
Authority and reliability
3.5/5
Expert rating
Real-world application tested