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
one of only two
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase 'one of only two' is grammatically correct and can be used in written English.
For example, you could write: "The small town was one of only two places to offer the unique cuisine."
✓ Grammatically correct
News & Media
Academia
Science
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
58 human-written examples
The home is situated on one of only two highly coveted, beach-front streets in Malibu.
News & Media
Jenner is one of only two women on the list.
News & Media
Kane's penalty was one of only two shots on target in the first half.
News & Media
One of only two sample loops on the whole LP, in fact.
News & Media
Leave it to one of only two fifth-graders on the team to spark Carden Hall.
News & Media
The club is one of only two in Israel.
News & Media
At school he was one of only two Jewish pupils.
News & Media
O'Neill is one of only two memorable characters.
News & Media
The Stanford MSx Program is one of only two master's degree programs at Stanford GSB.
Academia
Human-verified similar examples from authoritative sources
Similar Expressions
2 human-written examples
It is one of only two known copies.
Academia
One of only two Jewish girls admitted to the Gymnasium.
News & Media
Expert writing Tips
Best practice
Use "one of only two" to emphasize rarity or exclusivity. For example, "This species is one of only two remaining in the region."
Common error
Avoid using "one of only two" without clearly defining what the 'two' refers to. Ambiguity can arise if the context doesn't make the limited group obvious to the reader.
Source & Trust
84%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "one of only two" serves as a determiner and qualifier, specifying membership within a very restricted set. Ludwig AI confirms that the phrase is used to highlight rarity or exclusivity, as seen in the examples.
Frequent in
News & Media
49%
Academia
36%
Science
15%
Less common in
Encyclopedias
0%
Formal & Business
0%
Social Media
0%
Ludwig's WRAP-UP
In summary, the phrase "one of only two" is a grammatically sound and frequently used expression to highlight the rarity or exclusivity of something. Ludwig AI confirms its appropriateness across diverse contexts. Analysis of the examples reveals that it is most commonly found in News & Media and Academia, with a neutral register that fits both formal and informal settings. When using this phrase, ensure that the scope is clearly defined to avoid ambiguity.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
one of just a pair
Replaces "only two" with "just a pair" for a slightly more informal tone.
one among merely two
Uses "merely two" to emphasize the small number, sounding more formal.
one of a scarce duo
Replaces "only two" with "a scarce duo" to highlight rarity.
part of a unique couple
Emphasizes the uniqueness of the pair and uses "couple" instead of "two."
included in a mere couple
Similar to 'one among merely two', reinforcing a small quantity
one of a select pair
Highlights exclusivity, using "select" to imply a chosen or special group of two.
belonging to a scant duet
Uses "scant duet" to convey that the number is barely sufficient.
a member of a limited twosome
Emphasizes belonging to a very restricted group of two.
one half of a rare set
Positions the subject as one part of a unique set.
a component of a restricted pair
Highlights being part of something limited or exclusive.
FAQs
How can I use "one of only two" in a sentence?
Use "one of only two" to emphasize that something belongs to a very small and exclusive set. For example, "This restaurant is one of only two in the city that serves authentic paella."
What's a similar phrase to "one of only two"?
Alternatives include phrases like "one of just a pair", "one among merely two", or "part of a unique couple", depending on the nuance you want to convey.
Is it correct to say "one of only two"?
Yes, "one of only two" is grammatically correct and commonly used to indicate that something is part of a very limited set.
What does "one of only two" emphasize?
The phrase "one of only two" emphasizes the rarity, exclusivity, or limited nature of something by highlighting its membership in a set containing only two items.
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
84%
Authority and reliability
4.5/5
Expert rating
Real-world application tested